CN115436989B - Beam distribution detection device and beam distribution detection method - Google Patents
Beam distribution detection device and beam distribution detection methodInfo
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- CN115436989B CN115436989B CN202110625375.7A CN202110625375A CN115436989B CN 115436989 B CN115436989 B CN 115436989B CN 202110625375 A CN202110625375 A CN 202110625375A CN 115436989 B CN115436989 B CN 115436989B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
- G01T1/2914—Measurement of spatial distribution of radiation
- G01T1/2964—Scanners
- G01T1/2971—Scanners using solid state detectors
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Abstract
The present disclosure relates to a beam profile dedicated detection apparatus and a beam profile detection method. The special beam distribution detection device comprises at least one detector module, wherein the detector module comprises a linear array detector and a logic control module, the linear array detector is configured to collect beam data according to the indication of the logic control module, the logic control module is configured to process the beam data, judge whether the beam state meets the preset requirement according to the processed beam data, and adjust the beam under the condition that the beam state does not meet the preset requirement. The method adopts the linear array detector, has simple use method and greatly saves the debugging time.
Description
Technical Field
The present disclosure relates to the field of beam profile detection, and in particular, to a beam profile dedicated detection apparatus and a beam profile detection method.
Background
In the related art, a radiation beam generated by a radiation source (such as an X-ray machine, an accelerator and the like) is in a cone shape with a larger opening angle, and the opening angle of the emergent beam is limited to a specific angle by the restriction of a collimator.
In order to realize the ideal beam state, the relative position relation among the radiation source, the collimator and the detector needs to be adjusted, namely, the beam just covers the sensitive area of the detector, and the beam is perpendicularly incident to the sensitive area of the detector. There are 2 debugging methods of the related art:
First, use is made of a detector in the system. And after each position adjustment, the collimator and the detector are successively finely adjusted, beam output data of the detector of the system are collected, the collected results are compared, and the optimal relative position is found out through data processing. The method has low debugging efficiency, and because the information acquired after single adjustment is less, a large amount of fine adjustment is needed to acquire enough data, and a large amount of manpower is consumed.
Second, an additional detector is placed between the detector and the beam, with which the intensity distribution of the beam over a wider range is measured at one time. The direction and amplitude of the required position adjustment can be deduced from the distribution data, and the adjustment is measured again to determine whether further adjustment is required.
Disclosure of Invention
The detection method of placing an additional detector between the detector and the beam current in the related art can obtain more information in a single adjustment measurement than the detection method by using the detector in the system, so that the required adjustment times are fewer, and the debugging efficiency is higher. The additional detectors are arranged between the detector and the beam current, and can be divided into single-point detectors, linear array detectors and area array detectors according to specific detector types, wherein the number of the linear array detectors is 3:
the single point detector needs to scan along the direction perpendicular to the beam plane, and the scanning needs mechanical movement, so that the time for acquiring data once is long.
The pixel arrangement direction of the linear array detector is perpendicular to the plane where the beam current is located, and data acquisition can be completed in a short time.
The area array detector can acquire two-dimensional distribution of beam current, and data information is richer than that of the linear array detector, but because of larger data volume, longer data acquisition and transmission time, high-speed synchronous acquisition is difficult to realize. The number of pixels of the external array detector is far more than that of the linear array detector, and the cost of the external array detector is usually several times or tens times that of the linear array detector.
The linear array detector has higher cost performance and flexibility, and is suitable for beam current debugging of radiation equipment. However, no linear array detector special for beam current debugging is available in the market at present, a general linear array detector is used, the using method of the linear array detector is similar to that of a system detector, the linear array detector needs to be fixed between the beam current and the system detector, a cable is used for supplying power and communicating with a controller or an upper computer, the deployment and the operation are complex, and the technical and experience requirements of a debugging person are high.
In view of at least one of the above technical problems, the present disclosure provides a beam distribution dedicated detection device and a beam distribution detection method, and the use method of the linear array detector is simple, so that the debugging time is greatly saved.
According to one aspect of the present disclosure, there is provided a beam current distribution dedicated detection device, including at least one detector module, the detector module including a linear array detector and a logic control module, wherein:
The linear array detector is configured to collect beam data according to the indication of the logic control module;
The logic control module is configured to process the beam data, judge whether the beam state meets the preset requirement according to the processed beam data, and adjust the beam when the beam state does not meet the preset requirement.
In some embodiments of the present disclosure, the logic control module is further configured to adjust the beam by adjusting the collimator position and size if the beam state does not meet the predetermined requirement, and to end the measurement and close the detector module if the beam state meets the predetermined requirement.
In some embodiments of the present disclosure, the detector module further comprises:
A radiation window configured to identify a sensitive region of the linear array detector, wherein the sensitive region of the linear array detector is used for positional alignment of the module with the beam.
In some embodiments of the disclosure, the beam profile dedicated detection device further comprises an auxiliary mechanical device comprising an adsorption device, wherein:
and the adsorption device is configured to fix the magnetic base on the surface of the arm support through switching the magnetic base and fix the detector module on the magnetic base.
In some embodiments of the present disclosure, the auxiliary mechanical device further comprises a motion module comprising a displacement stage and a displacement stage driver, the detector module further comprising a drive interface, wherein:
the displacement table driver is connected with the driving interface;
And the displacement table driver is configured to control the movement of the displacement table according to the signal instruction sent by the detector module.
In some embodiments of the present disclosure, the beam profile dedicated detection device operates in at least one of an independent operation mode, a synchronous operation mode, a cascade operation mode, and a motion scanning operation mode.
In some embodiments of the present disclosure, the beam profile dedicated detection device operates in at least one of a remote control operation mode, a synchronous operation mode, a cascade operation mode, and a motion scanning operation mode.
In some embodiments of the present disclosure, the detector module further comprises a display module comprising a display screen and a display control circuit, wherein:
a display screen configured to display control information, beam data, and screen prompt information;
the screen control key is configured to receive parameter setting information and display control information input by an operator according to screen prompt information in an independent working mode, and send the parameter setting information and the display control information to the logic control module for detecting beam current distribution.
In some embodiments of the present disclosure, the detector module further comprises a communication module, wherein:
the communication module is configured to communicate with the upper computer;
the communication module is configured to communicate with the upper computer in a remote control working mode, receive working parameters set by the upper computer, send the working parameters to the logic control module, and return data processed by the logic control module to the upper computer.
In some embodiments of the present disclosure, the detector module further comprises a trigger input interface, wherein:
a trigger input interface configured to receive a trigger signal inputted from the outside;
The trigger input interface is configured to be connected with the trigger output interface of the radiation source in a synchronous working mode, and through setting working parameters of the detector module, the linear array detector is instructed to collect one or more times of beam data after receiving a trigger signal.
In some embodiments of the present disclosure, the detector module further comprises a trigger input interface and a trigger output interface, wherein:
a trigger input interface configured to receive a trigger signal inputted from the outside;
a trigger output interface configured to send a trigger signal to other modules or devices;
In the cascade working mode, the special detection device for beam current distribution comprises a plurality of detector modules, wherein the detector modules are in cascade connection through a trigger input interface and a trigger output interface so as to realize that the detector modules collect data of different positions of the beam current at the same time.
In some embodiments of the present disclosure, in a motion scanning mode of operation, the detector module is connected with the motion module;
The detector module is configured to send a command to enable the motion module to displace a distance after one or more data are acquired;
The motion module is configured to enable the sensitive area of the detector to cover a two-dimensional area through multiple displacements, and the beam data acquired multiple times are spliced to reconstruct two-dimensional beam position distribution data.
In some embodiments of the present disclosure, a linear array detector includes a detection array and an analog-to-digital conversion circuit, wherein:
the detection array is a single row of one-dimensional pixel arrangement.
In some embodiments of the present disclosure, the detection array is at least one of a dual-energy detector and a multi-row detector, wherein the dual-energy detector is a stacked structure of an upper layer of detectors and a lower layer of detectors, and is used as a low-energy detector and a high-energy detector, and the multi-row detector is a quasi-two-dimensional array formed by splicing multiple rows of linear arrays.
According to another aspect of the present disclosure, there is provided a beam current distribution detection method, including:
Fixing a detector module in the beam irradiation area, wherein the detector module is a detector module of the beam distribution special detection device according to any embodiment;
collecting beam data under the condition that the beam flows out of the beam;
processing the beam data;
judging whether the beam state meets the preset requirement according to the processed beam data;
And adjusting the beam current under the condition that the beam current state does not meet the preset requirement.
In some embodiments of the present disclosure, the beam profile detection method further includes:
and ending the measurement and closing the detector module under the condition that the beam state meets the preset requirement.
In some embodiments of the present disclosure, the beam profile detection method further includes:
Under the condition that the beam state does not meet the preset requirement, the beam is adjusted by adjusting the position and the size of the collimator; the step of acquiring beam current data is then performed in case the beam exits the beam.
In some embodiments of the present disclosure, the beam profile detection method further includes:
setting the working mode of the beam distribution special detection device to at least one of an independent working mode, a synchronous working mode, a cascade working mode and a motion scanning working mode;
In some embodiments of the present disclosure, the beam profile detection method further includes:
and setting the working mode of the beam distribution special detection device to at least one of a remote control working mode, a synchronous working mode, a cascade working mode and a motion scanning working mode.
In some embodiments of the present disclosure, the beam profile detection method further includes:
In the independent working mode, the screen control key receives parameter setting information and display control information input by an operator according to the screen prompt information, and the parameter setting information and the display control information are sent to the logic control module to detect beam current distribution.
In some embodiments of the present disclosure, the beam profile detection method further includes:
in a remote control working mode, the working parameters set by the upper computer are received through the communication module, the working parameters are sent to the logic control module, and the data processed by the logic control module are returned to the upper computer.
In some embodiments of the present disclosure, the beam profile detection method further includes:
in the synchronous working mode, the trigger input interface is connected with a trigger output interface of the radiation source, and working parameters of the detector module are set; after receiving a trigger signal, the linear array detector is instructed to collect one or more beam data.
In some embodiments of the present disclosure, the beam profile detection method further includes:
In the cascade operation mode, a plurality of detector modules are cascaded through a trigger input interface and a trigger output interface so as to realize that the plurality of detector modules collect data of different positions of a beam flow at the same time.
In some embodiments of the present disclosure, the beam profile detection method further includes:
Under the motion scanning working mode, the detector module is connected with the motion module;
After each acquisition of one or more times of data, the detector module sends a command to enable the motion module to move for a distance;
the motion module is used for enabling the sensitive area of the detector to cover a two-dimensional area through multiple displacements, and the beam data acquired multiple times are spliced to reconstruct two-dimensional beam position distribution data.
The method adopts the linear array detector, has simple use method and greatly saves the debugging time.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a schematic diagram of some embodiments of a beam profile specific detection apparatus of the present disclosure.
Fig. 2 is a schematic diagram of some embodiments of the measurement mode of the external probe of the present disclosure.
FIG. 3 is a schematic diagram of some embodiments of a detector module of the present disclosure.
Fig. 4a and 4b are schematic diagrams of some embodiments of fan beam structures of the present disclosure.
Fig. 5a and 5b are schematic diagrams of some embodiments of the pencil beam structure of the present disclosure.
Fig. 6 is a schematic diagram of beam intensity distribution in some embodiments of the present disclosure.
Fig. 7 is a schematic illustration of alignment of a three-point line in some embodiments of the present disclosure.
Fig. 8 is a schematic diagram of a detector sensitivity zone and a beam distribution area in some embodiments of the present disclosure.
Fig. 9 is a schematic block interface diagram of a detector block in some embodiments of the present disclosure.
Fig. 10 is a schematic diagram of a motion scanning operation mode of a beam distribution dedicated detection device according to some embodiments of the present disclosure.
Fig. 11 is a schematic diagram of a typical pencil beam image obtained in beam motion scanning mode in some embodiments of the present disclosure.
Fig. 12 is a schematic diagram of an operation mode combination of a beam distribution dedicated detection device according to some embodiments of the present disclosure.
Fig. 13 is a schematic diagram of some embodiments of a beam profile detection method of the present disclosure.
Fig. 14 is a schematic diagram of another embodiment of a beam profile detection method according to the present disclosure.
Detailed Description
The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Fig. 1 is a schematic diagram of some embodiments of a beam profile specific detection apparatus of the present disclosure. As shown in fig. 1, the beam profile dedicated detection apparatus of the present disclosure may include at least one detector module 100 and an auxiliary mechanical device 200, wherein:
And the auxiliary mechanical device 200 is used for fixing the detector module 100 in the beam irradiation area so that the plane of the beam is perpendicular to the axis of the linear array detector.
The method adopts an external detector measuring mode to detect beam current distribution. Fig. 2 is a schematic diagram of some embodiments of the measurement mode of the external probe of the present disclosure. The above embodiments of the present disclosure place an additional detector between the detector and the beam, with which the intensity distribution of the beam over a wider range is measured at one time. The external detector has a larger sensitive area, exceeding the beam current distribution area. The above embodiments of the present disclosure can calculate the direction and the amplitude of the required position adjustment according to the distribution data (e.g., beam current distribution curve), and measure again after adjustment to determine whether further adjustment is required.
In some embodiments of the present disclosure, the auxiliary mechanical device may include an adsorption device, a movement module, a connector, and the like, wherein:
The adsorption device is configured to fix the magnetic base on the surface of the arm support through switching the magnetic base, and fix the detector module 100 on the magnetic base, so that the position of the module can be flexibly adjusted according to requirements.
In some embodiments of the present disclosure, the adsorption means mainly refers to magnetic adsorption, and the equipment boom is composed of a material having magnetic induction, such as iron, stainless steel, or the like.
In some embodiments of the present disclosure, the motion module comprises a displacement stage (screw) and a displacement stage driver, the detector module further comprising a drive interface, wherein:
The displacement platform driver is connected with the driving interface.
And a displacement table driver configured to control the movement (e.g., back and forth movement) of the displacement table according to the signal instruction transmitted from the detector module.
FIG. 3 is a schematic diagram of some embodiments of a detector module of the present disclosure. As shown in fig. 3, the detector module 100 of the present disclosure may include a linear array detector 101 and a logic control module 102, wherein:
The linear array detector 101 is configured to collect beam data according to the instruction of the logic control module.
The logic control module 102 is configured to process the beam data, determine whether the beam state meets a predetermined requirement according to the processed beam data, and adjust the beam if the beam state does not meet the predetermined requirement.
In some embodiments of the present disclosure, the logic control module 102 may be further configured to adjust the beam by adjusting the collimator position and size if the beam state does not meet the predetermined requirement, and end the measurement and turn off the detector module if the beam state meets the predetermined requirement.
In some embodiments of the present disclosure, the radiation beam collimator is divided into a slit shape and a micro-hole shape according to the shape of the region from which the beam can exit.
Fig. 4a and 4b are schematic diagrams of some embodiments of fan beam structures of the present disclosure. Fig. 4a is a top view and fig. 4b is a front view. As shown in fig. 4a and 4b, the beam emitted from the slit-shaped collimator is a fan-shaped beam, and is commonly used in a row-packet inspection apparatus, a CT (Computed Tomography ) apparatus, a vehicle/container inspection apparatus, and the like.
Fig. 5a and 5b are schematic diagrams of some embodiments of the pencil beam structure of the present disclosure. Fig. 5a is a top view and fig. 5b is a front view. As shown in fig. 5a and 5b, the beam emitted by the micro-hole collimator is a pen-shaped beam, and is commonly used in back dispersion detection equipment.
The above embodiments of the present disclosure are mainly applied to detection of fan-shaped beam, and may also be used for detection of pencil-shaped beam, in which the fan-shaped beam is used by default in the technical scheme of the above embodiments of the present disclosure, and a portion different from the pencil-shaped beam is separately proposed.
Fig. 6 is a schematic diagram of beam intensity distribution in some embodiments of the present disclosure. As shown in fig. 6, the beam current limited by the collimator has a smaller distribution range at the detector, the middle convex part generates signals for the beam current, and the two sides have no beam current signals basically.
Fig. 7 is a schematic illustration of alignment of a three-point line in some embodiments of the present disclosure. As shown in fig. 7, the logic control module 102 may be configured to adjust the relative positional relationship among the radiation source, the collimator and the detector, so as to enable the beam state to meet the predetermined requirement. For fan beam, multiple three-point collineation conditions are satisfied.
In some embodiments of the present disclosure, the predetermined requirement may be that the beam just covers the detector sensitivity zone and that the beam is normal to the detector sensitivity zone.
Fig. 8 is a schematic diagram of a detector sensitivity zone and a beam distribution area in some embodiments of the present disclosure. As shown in fig. 8, the dashed line is the beam effective irradiation area (view along the beam inflow irradiation direction). In an ideal case, the plane of the fan beam should be perpendicular to the sensitive surface of the detector, and the beam distribution area should coincide with the sensitive area of the detector, and should not be too large or too small. If the beam distribution area is larger than the sensitive area of the detector, the excess beam is not converted into a useful signal, resulting in an unnecessary increase of the radiation dose. If the beam distribution area is smaller than the sensitive area of the detector, part of the detector sensitive area has no beam incident, which may result in a decrease in signal-to-noise ratio and an increase in non-uniformity of the signal. In addition, the problems of beam deviation from the sensitive area of the detector, oblique incidence of the beam to the sensitive area of the detector and the like exist in the actual debugging of the related technology.
In some embodiments of the present disclosure, as shown in fig. 3, the detector module 100 of the present disclosure may include a linear array detector 101, a logic control module 102, a communication module 103, a power supply module 104, and a display module 105, wherein:
As shown in fig. 3, the line detector 101, the logic control module 102, the communication module 103, the power supply module 104, and the display module 105 may be packaged in one box.
The linear array detector 101 is configured to convert the beam radiation into an electrical signal, and further convert the electrical signal into a digital signal, and the size of the digital signal represents the distribution intensity of the beam at the corresponding pixel. The linear array detector 101 sets parameters such as acquisition time, gain, bit depth, trigger time and the like according to the command of the logic control module 102, acquires signals, and transmits the signals back to the logic control module 102.
In some embodiments of the present disclosure, the linear array detector 101 may include a detection array and analog to digital conversion circuit 106, wherein:
in some embodiments of the present disclosure, the detection array is a single row one-dimensional pixel arrangement, i.e., (1×n array) ray detection array.
In other embodiments of the present disclosure, the detection array is at least one of a dual energy detector and a multi-row detector.
In some embodiments of the present disclosure, the dual-energy detector is a stacked structure of two layers of detectors, namely, a low-energy detector and a high-energy detector. The dual-energy detector has the advantage that energy information of the beam current can be acquired. Generally, beam tuning is mainly related to position distribution of beams, and the situation that energy information is needed to be known is less frequently, and a dual-energy detector brings about cost and increase in volume and weight.
In some embodiments of the present disclosure, the multiple rows of detectors are quasi-two-dimensional arrays of multiple rows of linear arrays (e.g., 2×n, 3×n, or more). The multi-row detector has the advantages that the area covered by single displacement is larger and the required displacement times are smaller in the motion scanning working mode. The fewer displacements of the multiple row detector reduces the scanning time, since the time spent by the mechanical movement is the most occupied during the whole scanning process. In most debug scenarios, the use of a motion scanning mode is not required, so the requirement is weak, and the multiple row detector can increase cost and bulk weight.
In some embodiments of the present disclosure, the logic control module 102 may include logic circuitry (e.g., FPGA (Field Programmable GATE ARRAY, field programmable gate array), ARM (ADVANCED RISC MACHINE, advanced reduced instruction set machine), etc.), storage circuitry (e.g., RAM (Random Access Memory, random access memory), SD (Secure Digital Memory Card ), etc.). The logic control module 102 can perform general calculation and data storage, and is equipped with a control system of the module, which is responsible for controlling the behavior of other modules.
In some embodiments of the present disclosure, the communication module 103 may include a wired communication module and a wireless communication module, which are used for communicating with an upper computer, receiving a command from the upper computer, sending the command to the logic control module 102, and returning the data processed by the logic control module 102 to the upper computer. Wired communication uses common interfaces such as ethernet, USB (Universal Serial Bus ) or HDMI (High Definition Multimedia Interface, high-definition multimedia interface). The wireless communication uses common wireless communication modules such as WiFi, bluetooth and the like.
In some embodiments of the present disclosure, the upper computer may be an industrial personal computer, a PC, a tablet computer, or the like.
In some embodiments of the present disclosure, as shown in fig. 3, the power module 104 may include a power interface and battery for powering the various modules of the module.
In some embodiments of the present disclosure, the battery may be a rechargeable battery. The power interface is connected with a low-voltage direct-current external power supply and can charge the rechargeable battery. In the absence of an external power source, the module is powered by a rechargeable battery.
In other embodiments of the present disclosure, the battery may be a disposable battery. Because the power consumption of the module is higher (the screen is in a normally-on state), the electric quantity of a common disposable battery is smaller, and the sustainable working time is shorter.
And a display module 105. Comprises a display screen and a display control circuit for displaying basic control navigation and collected data (position distribution curve of beam current, etc.). The results displayed are provided by the logic control module. Generally, the display screen has better power consumption, and parameters such as display time, display brightness and the like can be controlled according to actual conditions.
The above embodiments of the present disclosure provide a detection device dedicated for measuring radiation beam current distribution, which combines multiple functional modules to be packaged into an independent operation module (detector module) on the basis of a linear array detector, and forms a complete set of measurement device by matching with other accessories (auxiliary mechanical devices).
Fig. 9 is a schematic block interface diagram of a detector block in some embodiments of the present disclosure. As shown in fig. 9, the detector module of the present disclosure may leave a series of physical interfaces on its housing or panel for device connection and user interaction. The physical interfaces may include interfaces such as a power interface 107, a communication interface 108, a trigger input interface 109, a trigger output interface 110, a drive interface 111, a radiation window 112, a screen window (display screen) 113, a power switch 114, a screen control button 115, a mechanical interface 116, etc., where:
The power interface 107 may be used to connect to a dc low voltage power source, power the detector module, and charge the rechargeable battery.
The communication interface 108, which may be a USB or ethernet connector, is used to transmit digital signals.
The trigger input interface 109 and the trigger output interface 110 may be rf coaxial connectors such as SMA, MCX, and the like.
The trigger input interface 109 and the trigger output interface 110 are used for transmitting trigger signals.
A trigger input interface 109 for receiving an externally input trigger signal.
The trigger output interface 110 is configured to send a trigger signal to other modules or devices.
The drive interface 111 may be a multi-core connector for transmitting and receiving electrical signals to drive other devices to operate. For example, the driving interface 111 may be connected to a displacement stage (screw) driver in the motion module, and controls the forward and backward movement of the displacement stage.
The radiation window 112 is configured to identify a sensitive area of the line detector 101, wherein the sensitive area of the line detector 101 is used for positional alignment of the module with the beam. .
The screen window 113 may be a display screen of the display module 105, and is used for displaying control information, beam data and screen prompt information.
The power switch 114 may be used to control the detector module to turn on and off.
The screen control button 115 may be used for parameter setting and display control according to the screen prompt information.
The mechanical interface 116 includes a mounting hole 1161 and a tripod interface 1162. The module floor is left with mounting holes 1161 and tripod interfaces 1162 for attachment or tripod mounting and other securing means.
In some embodiments of the present disclosure, the beam profile dedicated detection device operates in at least one of an independent operation mode, a synchronous operation mode, a cascade operation mode, and a motion scanning operation mode. That is, the above four modes may be used in combination to constitute a plurality of composite operation modes.
In other embodiments of the present disclosure, the beam profile dedicated detection device operates in at least one of a remote control mode of operation, a synchronous mode of operation, a cascade mode of operation, and a motion scanning mode of operation. That is, the above four modes may be used in combination to constitute a plurality of composite operation modes.
In some embodiments of the present disclosure, the stand-alone mode of operation and the remote mode of operation are mutually exclusive.
In some embodiments of the present disclosure, the display screen (screen window 113) may be configured to display control information, beam data, and screen prompt information. The screen control key 115 may be configured to receive parameter setting information and display control information input by an operator according to the screen prompt information in the independent working mode, and send the parameter setting information and the display control information to the logic control module 102 for detecting beam current distribution.
In some embodiments of the present disclosure, in the stand-alone mode of operation, the operator exits the beam irradiation region upon beam exit. When the beam stops exiting, the operator returns to the field and processes the beam data using screen control buttons 115 on the detector module. The independent working mode does not need complex equipment connection deployment, and is simple to operate.
In some embodiments of the present disclosure, the communication module 103 is configured to communicate with the upper computer in a remote control operation mode, receive an operation parameter of the detector module set by the upper computer, send the operation parameter to the logic control module 102, obtain data when the beam is output, and return the data processed by the logic control module 102 to the upper computer. The remote control working mode can reduce the round trip of personnel in the radiation area.
In some embodiments of the present disclosure, the trigger input interface 109 may be configured to connect to a trigger output interface of the radiation source in a synchronous operation mode, and instruct the linear array detector 101 to collect one or more beam data after receiving a trigger signal by setting the delay time, the integration time, the trigger number, and other operation parameters of the detector module. The synchronous mode of operation of the present disclosure is applicable to radiation sources having a pulsed mode of operation.
In some embodiments of the present disclosure, in a cascade mode of operation, the beam distribution dedicated detection apparatus may include a plurality of detector modules that are cascaded therebetween through the trigger input interface 109 and the trigger output interface 110 to achieve synchronous acquisition of the plurality of detector modules. The cascading operation mode of the present disclosure may enable a plurality of detector modules to collect data at different locations of a beam stream simultaneously.
Fig. 10 is a schematic diagram of a motion scanning operation mode of a beam distribution dedicated detection device according to some embodiments of the present disclosure. As shown in fig. 10, in the motion scanning mode of operation, the detector module is connected to the motion module.
And the detector module is configured to send a command to enable the motion module to displace a distance after each data acquisition, wherein the displacement direction is perpendicular to the axis of the linear array detector, and the displacement distance is equal to the length of a sensitive area of the detector along the displacement direction.
The motion module is configured to enable the sensitive area of the detector to cover a two-dimensional area through multiple displacements, and the beam data acquired multiple times are spliced to reconstruct two-dimensional beam position distribution data.
Fig. 11 is a schematic diagram of a typical pencil beam image obtained in beam motion scanning mode in some embodiments of the present disclosure. The motion scanning working mode can be suitable for pen-shaped beam current, and can acquire the information of the beam spot diameter, the shape and the like of the detector module.
Fig. 12 is a schematic diagram of an operation mode combination of a beam distribution dedicated detection device according to some embodiments of the present disclosure. In the embodiment of fig. 12, a combination of remote operation mode, synchronous operation mode, and cascade operation mode may be used simultaneously. As shown in fig. 12, 3 detector modules are fixed at different positions of the fan beam irradiation region, trigger interfaces are connected between the modules, and a trigger input of a first module is connected with a trigger output of the radiation source. The module is connected with the upper computer in a wired or wireless mode, and the upper computer is used for setting d measurement parameters of the detector module and retrieving the acquired beam data. In this case, beam profile information of the position at the beam 3 can be acquired at the same time.
The beam distribution special detection device of the above embodiment of the present disclosure is a radiation beam position detection device.
The beam current distribution special detection device disclosed by the embodiment of the disclosure is simple and convenient to use. When simple and fast beam measurements are made, only the stand-alone mode of operation may be used. At this time, the detector module does not need an external power supply or communicate with an upper computer, and basic beam measurement can be completed only by using a switch button of the detector module, so that a large amount of debugging time can be saved.
The special detection device for beam current distribution in the embodiment of the disclosure has high cost performance. The material cost of the detector module mainly comes from the linear array detector, and compared with a single-point detector, the detector module has slightly higher cost and volume, but no obvious difference exists. But the cost and the volume are obviously smaller than those of the area array detector, and the use efficiency of the two are equivalent.
The special detection device for beam current distribution of the embodiment of the disclosure is flexible and multipurpose. The device realizes a plurality of working modes, can be combined to use different working modes according to different beam current debugging requirements, and meets most application scenes.
Fig. 13 is a schematic diagram of some embodiments of a beam profile detection method of the present disclosure. Preferably, the present embodiment may be performed by the beam profile dedicated detection apparatus of the present disclosure. As shown in fig. 13, the beam profile detection method of the present disclosure may include steps 131-135, wherein:
Step 131, fixing a detector module in the beam irradiation area, wherein the detector module is a detector module of the beam distribution dedicated detection device according to any of the embodiments described above (e.g. any of the embodiments of fig. 1-12).
In step 132, beam data is acquired in the case of a beam exiting the beam.
Step 133, processing the beam data.
Step 134, judging whether the beam state meets the preset requirement according to the processed beam data.
And step 135, adjusting the beam current under the condition that the beam current state does not meet the preset requirement.
Fig. 14 is a schematic diagram of another embodiment of a beam profile detection method according to the present disclosure. Preferably, the present embodiment may be performed by the beam profile dedicated detection apparatus of the present disclosure. As shown in fig. 14, the beam profile detection method of the present disclosure may include steps 140-146, wherein:
In step 140, the measurement begins.
In some embodiments of the present disclosure, step 140 may include performing a module operating parameter setting. The module switch is turned on, and the working parameters (triggering, communication, acquisition and other parameters) of the module are set.
And 141, fixedly installing the module.
In some embodiments of the present disclosure, step 141 may include securing the module in the beam irradiation region using an auxiliary mechanical device such that the plane of the beam is perpendicular to the axis of the linear array detector.
In step 142, beam data is collected.
In some embodiments of the present disclosure, step 142 may include the module collecting signals generated by the beam as it exits the beam and storing them in the logic control module.
Step 143, processing the beam data.
In some embodiments of the present disclosure, step 143 may include extracting data of the beam after the beam stops exiting the beam, and calculating and displaying (beam position profile and other statistical information) as needed.
And 144, judging whether the beam state meets the preset requirement according to the processed beam data. Step 145 is performed if the beam state does not meet the predetermined requirement, otherwise step 146 is performed if the beam state meets the predetermined requirement.
Step 145, the beam current is adjusted, and step 142 is performed.
In some embodiments of the present disclosure, the step of adjusting the beam in step 145 may include adjusting the beam by adjusting a collimator position and a collimator size.
Step 146, end the measurement and shut down the detector module,
In some embodiments of the present disclosure, the beam profile detection method may further include setting an operation mode of the beam profile dedicated detection apparatus to at least one of an independent operation mode, a synchronous operation mode, a cascade operation mode, and a motion scanning operation mode;
In other embodiments of the present disclosure, the beam profile detection method may further include setting an operation mode of the beam profile dedicated detection apparatus to at least one of a remote control operation mode, a synchronous operation mode, a cascade operation mode, and a motion scanning operation mode.
In some embodiments of the present disclosure, the beam distribution detection method may further include, in an independent working mode, receiving, by the screen control key 115, parameter setting information and display control information input by an operator according to the screen prompt information, and sending the parameter setting information and the display control information to the logic control module 102 for detecting beam distribution.
In some embodiments of the present disclosure, the beam distribution detection method may further include, in a remote control working mode, receiving, by the communication module 103, a working parameter set by the host computer, sending the working parameter to the logic control module 102, and returning data processed by the logic control module 102 to the host computer.
In some embodiments of the present disclosure, the beam profile detection method may further include, in a synchronous working mode, connecting a trigger output interface of the radiation source through a trigger input interface, setting working parameters of the detector module, and after receiving a trigger signal, instructing the linear array detector 101 to collect one or more beam data.
In some embodiments of the present disclosure, the beam distribution detection method may further include cascading a plurality of detector modules through a trigger input interface and a trigger output interface in a cascading operation mode, so as to implement that the plurality of detector modules collect data of different positions of a beam at the same time.
In some embodiments of the disclosure, the beam distribution detection method may further include connecting the detector module with the motion module in a motion scanning mode, sending a command to displace the motion module by a distance after each acquisition of one or more times of data by the detector module, enabling the detector sensitive area to cover a two-dimensional area by the motion module through multiple displacements, and splicing the multiple acquired beam data to reconstruct the two-dimensional beam position distribution data.
The beam current distribution detection method of the embodiment of the disclosure is simple and convenient to operate. When simple and fast beam measurements are made, only the stand-alone mode of operation may be used. At this time, the detector module does not need an external power supply or communicate with an upper computer, and basic beam measurement can be completed only by using a switch button of the detector module, so that a large amount of debugging time can be saved.
The beam current distribution detection method of the embodiment of the disclosure has high cost performance. The material cost of the detector module mainly comes from the linear array detector, and compared with a single-point detector, the detector module has slightly higher cost and volume, but no obvious difference exists. But the cost and the volume are obviously smaller than those of the area array detector, and the use efficiency of the two are equivalent.
The beam current distribution detection method of the embodiment of the disclosure is flexible and multipurpose. The embodiment of the disclosure can realize a plurality of working modes, and can use different working modes according to different beam debugging requirements, thereby meeting most application scenes.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The logic control modules described above may be implemented as a general purpose processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof for performing the functions described herein.
Thus far, the present disclosure has been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
Those of ordinary skill in the art will appreciate that all or a portion of the steps implementing the above embodiments may be implemented by hardware, or may be implemented by a program indicating that the relevant hardware is implemented, where the program may be stored on a non-transitory computer readable storage medium, where the storage medium may be a read-only memory, a magnetic disk or optical disk, etc.
The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (20)
1. The special detection device for beam distribution is characterized by comprising at least one detector module, wherein the detector module comprises a linear array detector, a ray window and a logic control module, and the special detection device for beam distribution is an external detector between beam and a system detector, and the special detection device for beam distribution is characterized in that:
The linear array detector is configured to collect beam data according to the indication of the logic control module;
the logic control module is configured to process the beam data, and judge whether the beam state meets the preset requirement according to the processed beam data, wherein the preset requirement is that the beam distribution area is equal to the sensitive area of the linear array detector, and the beam vertically enters the sensitive area of the linear array detector;
A radiation window configured to identify a sensitive region of the linear array detector, wherein the sensitive region of the linear array detector is used for positional alignment of the module with the beam.
2. The beam profile dedicated detection apparatus as claimed in claim 1, wherein,
And the logic control module is further configured to adjust the beam current by adjusting the position and the size of the collimator under the condition that the beam current state does not meet the preset requirement, and finish the measurement and close the detector module under the condition that the beam current state meets the preset requirement.
3. The beam profile dedicated detection apparatus according to claim 1 or 2, further comprising an auxiliary mechanical device comprising an adsorption device, wherein:
and the adsorption device is configured to fix the magnetic base on the surface of the arm support through switching the magnetic base and fix the detector module on the magnetic base.
4. The beam profile dedicated detection apparatus according to claim 3, wherein the auxiliary mechanical device further comprises a motion module, the motion module comprising a displacement stage and a displacement stage driver, the detector module further comprising a drive interface, wherein:
the displacement table driver is connected with the driving interface;
And the displacement table driver is configured to control the movement of the displacement table according to the signal instruction sent by the detector module.
5. The beam profile dedicated detection apparatus as claimed in claim 4, wherein,
The beam distribution special detection device works in at least one working mode of an independent working mode, a synchronous working mode, a cascade working mode and a motion scanning working mode;
Or alternatively, the first and second heat exchangers may be,
The beam distribution special detection device works in at least one working mode of a remote control working mode, a synchronous working mode, a cascade working mode and a motion scanning working mode.
6. The beam profile dedicated detection apparatus as recited in claim 5, wherein the detector module further comprises a display module, the display module comprising a display screen and a display control circuit, wherein:
a display screen configured to display control information, beam data, and screen prompt information;
the screen control key is configured to receive parameter setting information and display control information input by an operator according to screen prompt information in an independent working mode, and send the parameter setting information and the display control information to the logic control module for detecting beam current distribution.
7. The beam profile dedicated detection apparatus as recited in claim 5, wherein the detector module further comprises a communication module, wherein:
the communication module is configured to communicate with the upper computer;
the communication module is configured to communicate with the upper computer in a remote control working mode, receive working parameters set by the upper computer, send the working parameters to the logic control module, and return data processed by the logic control module to the upper computer.
8. The beam profile specific detection apparatus of claim 5, wherein the detector module further comprises a trigger input interface, wherein:
a trigger input interface configured to receive a trigger signal inputted from the outside;
The trigger input interface is configured to be connected with the trigger output interface of the radiation source in a synchronous working mode, and through setting working parameters of the detector module, the linear array detector is instructed to collect one or more times of beam data after receiving a trigger signal.
9. The beam profile specific detection apparatus of claim 5, wherein the detector module further comprises a trigger input interface and a trigger output interface, wherein:
a trigger input interface configured to receive a trigger signal inputted from the outside;
a trigger output interface configured to send a trigger signal to other modules or devices;
In the cascade working mode, the special detection device for beam current distribution comprises a plurality of detector modules, wherein the detector modules are in cascade connection through a trigger input interface and a trigger output interface so as to realize that the detector modules collect data of different positions of the beam current at the same time.
10. The beam profile dedicated detection apparatus as claimed in claim 5, wherein,
In the motion scanning working mode, the detector module is connected with the motion module;
The detector module is configured to send a command to enable the motion module to displace a distance after one or more data are acquired;
The motion module is configured to enable the sensitive area of the detector to cover a two-dimensional area through multiple displacements, and the beam data acquired multiple times are spliced to reconstruct two-dimensional beam position distribution data.
11. The beam profile dedicated detection apparatus according to claim 1 or 2, wherein the linear array detector comprises a detection array and an analog-to-digital conversion circuit, wherein:
the detection array is arranged in a single row of one-dimensional pixels;
Or alternatively, the first and second heat exchangers may be,
The detection array is at least one of a dual-energy detector and a plurality of rows of detectors, wherein the dual-energy detector is of a structure that an upper layer of detector and a lower layer of detector are stacked and respectively used as a low-energy detector and a high-energy detector, and the plurality of rows of detectors are quasi-two-dimensional arrays formed by splicing a plurality of rows of linear arrays.
12. A beam profile detection method, comprising:
fixing a detector module in the beam irradiation region, wherein the detector module is a detector module of a beam distribution dedicated detection device according to any one of claims 1-11;
collecting beam data under the condition that the beam flows out of the beam;
processing the beam data;
judging whether the beam state meets the preset requirement according to the processed beam data;
And adjusting the beam current under the condition that the beam current state does not meet the preset requirement.
13. The beam profile detection method of claim 12, further comprising:
and ending the measurement and closing the detector module under the condition that the beam state meets the preset requirement.
14. The beam profile detection method according to claim 13 or 12, further comprising:
Under the condition that the beam state does not meet the preset requirement, the beam is adjusted by adjusting the position and the size of the collimator; the step of acquiring beam current data is then performed in case the beam exits the beam.
15. The beam profile detection method according to claim 13 or 12, further comprising:
setting the working mode of the beam distribution special detection device to at least one of an independent working mode, a synchronous working mode, a cascade working mode and a motion scanning working mode;
Or alternatively, the first and second heat exchangers may be,
And setting the working mode of the beam distribution special detection device to at least one of a remote control working mode, a synchronous working mode, a cascade working mode and a motion scanning working mode.
16. The beam profile detection method of claim 15, further comprising:
In the independent working mode, the screen control key receives parameter setting information and display control information input by an operator according to the screen prompt information, and the parameter setting information and the display control information are sent to the logic control module to detect beam current distribution.
17. The beam profile detection method of claim 15, further comprising:
in a remote control working mode, the working parameters set by the upper computer are received through the communication module, the working parameters are sent to the logic control module, and the data processed by the logic control module are returned to the upper computer.
18. The beam profile detection method of claim 15, further comprising:
in the synchronous working mode, the trigger input interface is connected with a trigger output interface of the radiation source, and working parameters of the detector module are set; after receiving a trigger signal, the linear array detector is instructed to collect one or more beam data.
19. The beam profile detection method of claim 15, further comprising:
In the cascade operation mode, a plurality of detector modules are cascaded through a trigger input interface and a trigger output interface so as to realize that the plurality of detector modules collect data of different positions of a beam flow at the same time.
20. The beam profile detection method of claim 15, further comprising:
Under the motion scanning working mode, the detector module is connected with the motion module;
After each acquisition of one or more times of data, the detector module sends a command to enable the motion module to move for a distance;
the motion module is used for enabling the sensitive area of the detector to cover a two-dimensional area through multiple displacements, and the beam data acquired multiple times are spliced to reconstruct two-dimensional beam position distribution data.
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