CN110269636A - Stereoscopic imaging examination device for radiology department - Google Patents

Abstract

The invention discloses a three-dimensional imaging inspection device for radiology, which includes a frequency acquisition circuit 1, a frequency acquisition circuit 2, a wave limiting push-pull circuit, a reference comparison circuit and a filter output circuit. The analog signal frequency, frequency acquisition circuit 2 acquisition controller receives the analog signal frequency before the information acquisition module output signal modulation, the wave limiting push-pull circuit uses resistance R11, resistance R15 and triode Q2, triode Q2 to form a wave limiting circuit adjustment signal Waveform, the reference comparison circuit uses the operational amplifier AR1 to amplify the output signal of the frequency acquisition circuit 1 in phase, and the final filter output circuit uses the operational amplifier AR5 to amplify the signal, and uses the inductor L1, capacitor C10, and capacitor C11 to form a filter circuit to filter the signal clutter before outputting , that is, the analog signal correction signal before the controller receives the output signal of the information acquisition module is modulated, and overcomes the error caused by signal attenuation.

Description

Stereoscopic imaging inspection device for radiology

technical field

The invention relates to the technical field of circuits, in particular to a three-dimensional imaging inspection device for radiology.

Background technique

At present, the three-dimensional imaging inspection device used in the radiology department includes a controller, an information acquisition module, a signal transmission module and an imaging module. Drive the imaging module to achieve stereoscopic imaging, and because the signal will attenuate during the transmission process, there will be an error in the frequency of the modulated signal sent by the information acquisition module and the analog signal before demodulation received by the controller. When the error is large, the It will directly cause the signal received by the controller to be distorted, and the human body to be tested needs to be re-photographed, which seriously affects the performance of the stereoscopic imaging device used in radiology.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a stereoscopic imaging inspection device for radiology, which has the characteristics of ingenious design and humanized design, and can send modulated signals and controllers to the information acquisition module The frequency of the received analog signal before demodulation is monitored in real time, and the two signals are adjusted and converted into an analog signal correction signal before the output signal modulation of the controller receiving information acquisition module.

The technical solution is that the three-dimensional imaging inspection device used in the radiology department includes a controller, an information collection module, a signal transmission module and an imaging module. The information collection module collects the three-dimensional information of the human body to be tested and sends it to the controller through the signal transmission module. , the controller processes the signal to drive the imaging module to realize three-dimensional imaging, and also includes a frequency acquisition circuit 1, a frequency acquisition circuit 2, a wave limiting push-pull circuit, a reference comparison circuit and a filter output circuit, and the frequency acquisition circuit 1 acquires information acquisition module modulation After the analog signal frequency, the frequency acquisition circuit 2 acquisition controller receives the analog signal frequency before the information acquisition module output signal modulation, and the wave-limiting push-pull circuit uses resistance R11-resistance R15 and triode Q2, triode Q2 to form a wave-limiting circuit adjustment Signal waveform, using operational amplifier AR3, operational amplifier AR4, capacitor C7, and capacitor C8 to form a filter circuit to filter out disturbance signals in the signal, and the output signal of operational amplifier AR4 passes through a push-pull circuit composed of triode Q4 and triode Q5. After reducing the conduction loss of the signal, it is input into the filter output circuit, and the two-way input is in the inverting input terminal of the operational amplifier AR2 in the reference comparison circuit. The reference comparison circuit uses the operational amplifier AR1 to amplify the output signal of the frequency acquisition circuit 1 in phase, and uses the diode D4 at the same time. , diode D5 and capacitor C2 form a noise reduction circuit to reduce the noise ratio of the output signal of the op amp AR1, and use the op amp AR2 to compare the output signals of the op amp AR1 and the op amp AR4, and the output signal of the op amp AR2 is the MOS tube Q1 The trigger signal is used to judge the potential difference of the output signals of the op amp AR1 and the op amp AR4. When the potential difference is too large, the MOS transistor Q1 is turned on and sent to the controller through the signal transmitter E1, prompting abnormality, and at the same time input filtering In the output circuit, the final filter output circuit uses the operational amplifier AR5 to amplify the signal, and uses the inductor L1, the capacitor C10, and the capacitor C11 to form a filter circuit to filter the signal clutter and then output it, that is, to receive the information acquisition module for the controller before the output signal is modulated. The analog signal correction signal;

The wave-limiting push-pull circuit includes a triode Q3, the base of the triode Q3 is connected to one end of the resistor R13 and the capacitor C4, the emitter of the triode Q3 is grounded, the collector of the triode Q3 is connected to the base of the triode Q2 and one end of the resistor R12, and the transistor Q2 The collector and the other end of resistor R12 are connected to the power supply +5V, the emitter of transistor Q2 is connected to resistor R14, resistor R16, resistor R17 and one end of capacitor C7, the other end of capacitor C4 is connected to resistor R11, one end of capacitor C5, resistor R11 The other end of the resistor R13 is connected to the resistor R15 and one end of the capacitor C6, the other end of the capacitor C6 is connected to the ground, the other end of the resistor R15 is connected to the other end of the capacitor C5 and the other end of the resistor R14, and the other end of the resistor R16 is connected to the ground , the other end of the capacitor C7 is connected to the non-inverting input of the operational amplifier AR3, the inverting input of the operational amplifier AR3 is connected to the resistor R18 and one end of the capacitor C8, the output terminal of the operational amplifier AR3 is connected to one end of the resistor R19, and the resistor R19 is connected to the output terminal of the operational amplifier AR3. The other end is connected to the non-inverting input terminal of the operational amplifier AR4, the inverting input terminal of the operational amplifier AR4 is connected to one end of the resistor R20, the other end of the resistor R17, the resistor R18, the resistor R20 and the capacitor C8 are grounded, and the output terminal of the operational amplifier AR4 Connect the base of transistor Q4 and transistor Q5, the collector of transistor Q5 is connected to the power supply +5V, the emitter of transistor Q5 is connected to the emitter of transistor Q4, the collector of transistor Q4 is connected to one end of variable resistor R21, and the terminal of variable resistor R21 The other end is grounded.

Due to the adoption of the above technical solutions, the present invention has the following advantages compared with the prior art;

1. Use resistor R11-resistor R15 and triode Q2, triode Q2 to form a wave limiting circuit to adjust the signal waveform, and resistor R11, resistor R13, resistor R15 and capacitor C4-capacitor C6 to form a frequency selection circuit to isolate abnormal frequency signals. At the same time, use triode Q2, Transistor Q3 forms a triode amplifier circuit to amplify the isolated signal and reduce the influence of abnormal signal frequency by increasing the peak value of the signal. At the same time, the op amp AR3, op amp AR4, capacitor C7, and capacitor C8 are used to form a filter circuit to filter out the disturbance signal in the signal. , use the decoupling capacitance of capacitor C7 and capacitor C8 to filter out disturbance signals, the output signal of operational amplifier AR4 is input into the filter output circuit after the push-pull circuit composed of transistor Q4 and transistor Q5 reduces the signal conduction loss, and at the same time improves the signal The switching speed ensures the reliability of the signal;

2. Use the operational amplifier AR1 to amplify the output signal of the frequency acquisition circuit 1 in phase and amplify the signal power. At the same time, use the diode D4, diode D5 and capacitor C2 to form a noise reduction circuit to reduce the noise ratio of the output signal of the operational amplifier AR1 to ensure the stability of the signal. To prepare for the comparison signal, use the operational amplifier AR2 to compare the output signals of the operational amplifier AR1 and the operational amplifier AR4. The output signal of the operational amplifier AR2 is the trigger signal of the MOS transistor Q1, and judge the output signals of the operational amplifier AR1 and the operational amplifier AR4. When the potential difference is too large, the MOS tube Q1 is turned on and sent to the controller through the signal transmitter E1, prompting abnormality, which can remind the user of the abnormality of the image, and at the same time input into the filter output circuit, when the potential difference is normal When the MOS tube Q1 is not turned on, the correction of the output signal of the wave-limiting push-pull circuit is realized, and the accuracy of the analog signal correction signal before the controller receives the output signal modulation of the information acquisition module is improved. Finally, the inductor L1 and the capacitor C10, Capacitor C11 forms a filter circuit to filter the signal clutter and output it, that is, to correct the analog signal signal before the output signal modulation of the controller receiving information acquisition module, which overcomes the error caused by signal attenuation.

Description of drawings

Fig. 1 is a block diagram of the radiology stereoscopic imaging inspection device of the present invention.

Fig. 2 is a schematic circuit diagram of the radiology stereoscopic imaging inspection device of the present invention.

Detailed ways

The aforementioned and other technical contents, features and functions of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings 1 to 2 . The structural contents mentioned in the following embodiments are all based on the accompanying drawings of the description.

Embodiment 1, a three-dimensional imaging inspection device for radiology, including a frequency acquisition circuit 1, a frequency acquisition circuit 2, a wave-limiting push-pull circuit, a reference comparison circuit, and a filter output circuit. The analog signal frequency, the frequency acquisition circuit 2 acquisition controller receives the analog signal frequency before the information acquisition module output signal modulation, the wave limiting push-pull circuit uses resistance R11-resistance R15 and transistor Q2, transistor Q2 to form a wave limiting circuit adjustment signal At the same time, the filter circuit composed of operational amplifier AR3, operational amplifier AR4, capacitor C7, and capacitor C8 is used to filter out the disturbance signal in the signal, and the output signal of operational amplifier AR4 is reduced by a push-pull circuit composed of triode Q4 and triode Q5. After the signal conduction loss is input into the filter output circuit, the two-way input is in the inverting input terminal of the operational amplifier AR2 in the reference comparison circuit. The reference comparison circuit uses the operational amplifier AR1 to amplify the output signal of the frequency acquisition circuit 1 in phase, and uses diodes D4, Diode D5 and capacitor C2 form a noise reduction circuit to reduce the noise ratio of the output signal of op amp AR1, and use op amp AR2 to compare the output signals of op amp AR1 and op amp AR4, and the output signal of op amp AR2 is the output signal of MOS transistor Q1 The trigger signal is used to judge the potential difference of the output signals of the operational amplifier AR1 and the operational amplifier AR4. When the potential difference is too large, the MOS transistor Q1 is turned on and sent to the controller through the signal transmitter E1, prompting abnormality, and at the same time, the input filter output In the circuit, the final filter output circuit uses the op amp AR5 to amplify the signal, and uses the inductor L1, capacitor C10, and capacitor C11 to form a filter circuit to filter the signal clutter and then output it, which is to receive the output signal of the information acquisition module for the controller before modulation Analog signal correction signal;

The wave-limiting push-pull circuit uses resistance R11-resistance R15 and transistor Q2, transistor Q2 to form a wave-limiting circuit to adjust the signal waveform, and resistance R11, resistance R13, resistance R15 and capacitor C4-capacitor C6 form a frequency selection circuit to isolate abnormal frequency signals, At the same time, triode Q2 and transistor Q3 are used to form a triode amplifier circuit to amplify the isolated signal, and reduce the influence of abnormal signal frequency by increasing the peak value of the signal. The disturbance signal in the signal is filtered by the decoupling capacitance of capacitor C7 and capacitor C8. Finally, the output signal of the operational amplifier AR4 passes through the push-pull circuit composed of transistor Q4 and transistor Q5 to reduce the signal conduction loss and then input the filter In the output circuit, the switching speed of the signal is improved at the same time to ensure the reliability of the signal. The two-way input reference is in the inverting input terminal of the operational amplifier AR2 in the comparison circuit, which is convenient for comparison with the reference signal and improves the accuracy of the signal. The base of the transistor Q3 Connect the resistor R13 and one end of the capacitor C4, the emitter of the transistor Q3 is grounded, the collector of the transistor Q3 is connected to the base of the transistor Q2 and one end of the resistor R12, the collector of the transistor Q2 and the other end of the resistor R12 are connected to the power supply +5V, the transistor The emitter of Q2 is connected to resistor R14, resistor R16, resistor R17 and one end of capacitor C7, the other end of capacitor C4 is connected to resistor R11, one end of capacitor C5, the other end of resistor R11 is grounded, the other end of resistor R13 is connected to resistor R15, capacitor One end of C6, the other end of capacitor C6 is grounded, the other end of resistor R15 is connected to the other end of capacitor C5 and the other end of resistor R14, the other end of resistor R16 is grounded, and the other end of capacitor C7 is connected to the non-inverting input end of op amp AR3 , the inverting input terminal of the operational amplifier AR3 is connected to one end of the resistor R18 and the capacitor C8, the output terminal of the operational amplifier AR3 is connected to one end of the resistor R19, and the other end of the resistor R19 is connected to the non-inverting input terminal of the operational amplifier AR4. The inverting input terminal of AR4 is connected to one end of resistor R20, the other end of resistor R17, resistor R18, resistor R20 and capacitor C8 are grounded, the output terminal of operational amplifier AR4 is connected to the base of transistor Q4 and transistor Q5, and the collector of transistor Q5 Connect to the power supply +5V, the emitter of the transistor Q5 is connected to the emitter of the transistor Q4, the collector of the transistor Q4 is connected to one end of the variable resistor R21, and the other end of the variable resistor R21 is grounded.

Embodiment 2, on the basis of Embodiment 1, the reference comparison circuit uses the operational amplifier AR1 to amplify the output signal of the frequency acquisition circuit 1 in phase, amplifies the signal power, and uses diode D4, diode D5 and capacitor C2 to form a noise reduction circuit at the same time to reduce The noise ratio of the output signal of the operational amplifier AR1 ensures the stability of the signal and prepares for the comparison signal. Use the operational amplifier AR2 to compare the output signals of the operational amplifier AR1 and the operational amplifier AR4. The output signal of the operational amplifier AR2 is the output signal of the MOS tube Q1. The trigger signal is used to judge the potential difference of the output signals of the operational amplifier AR1 and the operational amplifier AR4. When the potential difference is too large, the MOS transistor Q1 is turned on and sent to the controller through the signal transmitter E1, prompting abnormality, and at the same time, the input filter output In the circuit, when the potential difference is normal, the MOS transistor Q1 is not turned on, which realizes the correction of the output signal of the wave limiting push-pull circuit, and improves the accuracy of the analog signal correction signal before the controller receives the output signal modulation of the information acquisition module;

The specific structure of the reference comparison circuit, the non-inverting input terminal of the operational amplifier AR1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the capacitor C2 and the positive pole of the diode D4, the negative pole of the diode D4 is connected to the negative pole of the diode D5, and the operational amplifier The output terminal of the amplifier AR1 is connected to the resistor R4, one end of the resistor R6 and the anode of the diode D5, and the non-inverting input terminal of the operational amplifier AR2, and the inverting input terminal of the operational amplifier AR1 is connected to one end of the resistor R3 and the other end of the resistor R4, and the resistor The other end of R3 is grounded, the inverting input terminal of the operational amplifier AR2 is connected to one end of the resistor R7 and the output terminal of the operational amplifier AR4, the other end of the resistor R7 is grounded, and the output terminal of the operational amplifier AR2 is connected to the other end of the resistor R6 and The gate of the MOS transistor Q1, the drain of the MOS transistor Q1 are connected to the power supply +5V, the source of the MOS transistor Q1 is connected to the resistor R8, one end of the resistor R9 and the anode of the diode D3, and the other end of the resistor R9 is connected to the signal transmitter E1.

Embodiment 3, on the basis of Embodiment 2, the filter output circuit uses the operational amplifier AR5 to amplify the signal, and uses the inductor L1, the capacitor C10, and the capacitor C11 to form a filter circuit to filter the signal clutter and output it, that is, for the control The analog signal correction signal before the output signal modulation of the receiver information acquisition module overcomes the error caused by signal attenuation. The non-inverting input terminal of the operational amplifier AR5 is connected to the cathode of the diode D3, one end of the resistor R22 and the emitter of the transistor Q5. The inverting input terminal of the operational amplifier AR5 is connected to one end of the resistor R23, and the other end of the resistor R23 is grounded. The output terminal of the operational amplifier AR5 is connected to the other end of the resistor R22, the resistor R24, one end of the capacitor C10, and one end of the inductor L1. The other end of L1 is connected to the resistor R25 and one end of the capacitor C11, the other end of the resistor R25 is connected to the signal output port, and the other end of the resistor R24, the capacitor C10, and the capacitor C11 is grounded.

Embodiment four, on the basis of embodiment three, the frequency acquisition circuit 1 selects the frequency acquisition device J1 of SJ-ADC model to collect the analog signal frequency modulated by the information acquisition module, and the frequency acquisition circuit 2 selects the model SJ-ADC The frequency collector J2 acquisition controller receives the analog signal frequency before the output signal modulation of the information acquisition module, the power supply terminal of the frequency collector J1 is connected to the power supply +5V, the ground terminal of the frequency collector J1 is grounded, and the output terminal of the frequency collector J1 is connected to the stable The negative pole of the voltage tube D1 and one end of the resistor R1, the positive pole of the voltage regulator tube D1 are grounded, the other end of the resistor R1 is connected to one end of the capacitor C1, the positive pole of the diode D4, and the other end of the capacitor C1 is grounded; the frequency acquisition circuit 2 includes a model It is the frequency collector J2 of SJ-ADC. The power supply terminal of the frequency collector J2 is connected to the power supply +5V, the ground terminal of the frequency collector J2 is grounded, and the output terminal of the frequency collector J2 is connected to the negative pole of the regulator tube D2 and one end of the resistor R10. The positive pole of the regulator tube D2 is grounded, the other end of the resistor R10 is connected to one end of the capacitor C3 and the base of the transistor Q3, and the other end of the capacitor C3 is grounded.

When the present invention is specifically used, the three-dimensional imaging inspection device for radiology includes a frequency acquisition circuit 1, a frequency acquisition circuit 2, a wave limiting push-pull circuit, a reference comparison circuit and a filter output circuit, and the frequency acquisition circuit 1 acquires an information acquisition module The modulated analog signal frequency, the frequency acquisition circuit 2 acquisition controller receives the analog signal frequency before the information acquisition module output signal modulation, the wave limiting push-pull circuit uses resistors R11-resistor R15 and transistor Q2, transistor Q2 to form a wave limiting circuit Adjust the signal waveform, resistor R11, resistor R13, resistor R15 and capacitor C4-capacitor C6 form a frequency selection circuit to isolate abnormal frequency signals, and use transistor Q2 and transistor Q3 to form a transistor amplifier circuit to amplify the isolated signal and reduce the signal by increasing the peak value of the signal The impact of abnormal frequency, at the same time use the op amp AR3, op amp AR4 and capacitor C7, capacitor C8 to form a filter circuit to filter out the disturbance signal in the signal, use the decoupling capacitance of capacitor C7 and capacitor C8 to filter out the disturbance signal, and finally The output signal of the op amp AR4 passes through the push-pull circuit composed of transistor Q4 and transistor Q5 to reduce the signal conduction loss and then enters the filter output circuit. At the same time, the switching speed of the signal is increased to ensure the reliability of the signal. The second input refers to the comparison circuit In the inverting input terminal of the middle operational amplifier AR2, it is convenient to compare with the reference signal and improve the accuracy of the signal. The reference comparison circuit uses the operational amplifier AR1 to amplify the output signal of the frequency acquisition circuit 1 in phase, and uses diode D4, diode D5 and capacitor C2 at the same time Form a noise reduction circuit to reduce the noise ratio of the output signal of the op amp AR1, and use the op amp AR2 to compare the output signals of the op amp AR1 and the op amp AR4. The output signal of the op amp AR2 is the trigger signal of the MOS transistor Q1. The potential difference of the output signal of the amplifier AR1 and the operational amplifier AR4, when the potential difference is too large, the MOS transistor Q1 is turned on, and sent to the controller through the signal transmitter E1, indicating an abnormality, and input to the filter output circuit at the same time, and finally filtered The output circuit uses the operational amplifier AR5 to amplify the signal, and uses the inductor L1, the capacitor C10, and the capacitor C11 to form a filter circuit to filter the signal clutter and then output it, which is to receive the analog signal correction signal before the output signal modulation of the information acquisition module for the controller.

The above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited thereto; , the extension made, the operation method and the replacement of data should all fall within the protection scope of the present invention.

Claims (4)

1. the three-dimensional imaging inspection apparatus of dept. of radiology, including controller, information acquisition module, signal transmission module and imaging mould Block, information acquisition module acquire human body stereo information to be measured, are sent in controller through signal transmission module, controller processing letter Number driving image-forming module realizes three-dimensional imaging, which is characterized in that further includes frequency collection circuit 1, frequency collection circuit 2 and limit Wave push-pull circuit acquires information acquisition module and modulates with reference to comparison circuit and filtering output circuit, the frequency collection circuit 1 Frequency analog signal afterwards, 2 acquisition controller of frequency collection circuit receive the simulation before the modulation of information acquisition module output signal Signal frequency, the notch push-pull circuit form notch circuit tune with resistance R11- resistance R15 and triode Q2, triode Q2 Signal waveform is saved, while being filtered out in signal with transport and placing device AR3, transport and placing device AR4 and capacitor C7, capacitor C8 composition filter circuit Disturbing signal, push-pull circuit of the output signal of transport and placing device AR4 all the way through triode Q4, triode Q5 composition reduce signal conduction After loss in input filter output circuit, the input of two tunnels is with reference in transport and placing device AR2 inverting input terminal in comparison circuit, with reference to comparing Circuit uses transport and placing device AR1 with 1 output signal of phase amplification frequency Acquisition Circuit, while with diode D4, diode D5 and electricity Hold C2 composition Dolby circuit reduce transport and placing device AR1 output signal noise ratio, and with transport and placing device AR2 compare transport and placing device AR1, Transport and placing device AR4 output signal, transport and placing device AR2 output signal are the trigger signal of metal-oxide-semiconductor Q1, judge transport and placing device AR1, transport and placing device The potential difference of AR4 output signal, when potential difference is excessive, metal-oxide-semiconductor Q1 conducting is sent in controller through signal projector E1, Prompt is abnormal, while in input filter output circuit, finally filters output circuit and uses transport and placing device AR5 amplified signal, and transports It is exported after forming filter circuit filtering signal clutter with inductance L1 and capacitor C10, capacitor C11, that is to say to receive for controller and believe Analog signal revise signal before ceasing the modulation of acquisition module output signal；

The notch push-pull circuit includes triode Q3, one end of triode Q3 base stage connecting resistance R13, capacitor C4, triode Q3 Emitter ground connection, the base stage of the collector connecting transistor Q2 of triode Q3 and one end of resistance R12, the collector of triode Q2 With another termination power+5V of resistance R12, emitter connecting resistance R14, resistance R16, resistance R17 and the capacitor C7 of triode Q2 One end, one end of another terminating resistor R11 of capacitor C4, capacitor C5, the other end ground connection of resistance R11, resistance R13's is another One end of terminating resistor R15, capacitor C6, capacitor C6 the other end ground connection, the other end of another termination capacitor C5 of resistance R15 and The other end of resistance R14, the other end ground connection of resistance R16, the non-inverting input terminal of another termination transport and placing device AR3 of capacitor C7, fortune Put the anti-phase input terminating resistor R18 of device AR3, one end of capacitor C8, one end of the output terminating resistor R19 of transport and placing device AR3, electricity Hinder the non-inverting input terminal of another termination transport and placing device AR4 of R19, one end of the anti-phase input terminating resistor R20 of transport and placing device AR4, electricity The other end ground connection of R17, resistance R18, resistance R20 and capacitor C8 are hindered, the output of transport and placing device AR4 terminates triode Q4, triode The base stage of Q5, the collector of triode Q5 meet power supply+5V, and the emitter of triode Q5 connects the emitter of triode Q4, triode The collector of Q4 connects one end of variable resistance R21, the other end ground connection of variable resistance R21.

2. the three-dimensional imaging inspection apparatus of dept. of radiology as described in claim 1, which is characterized in that described to refer to comparison circuit packet Include transport and placing device AR1, one end of the homophase input terminating resistor R2 of transport and placing device AR1, one end of another termination capacitor C2 of resistance R2 With the anode of diode D4, the cathode of diode D4 connects the cathode of diode D5, output terminating resistor R4, the electricity of transport and placing device AR1 Hinder the non-inverting input terminal of one end of R6 and the anode of diode D5, transport and placing device AR2, the anti-phase input terminating resistor of transport and placing device AR1 One end of R3 and the other end of resistance R4, the other end ground connection of resistance R3, the one of the anti-phase input terminating resistor R7 of transport and placing device AR2 End and transport and placing device AR4 output end, resistance R7 the other end ground connection, transport and placing device AR2 output terminating resistor R6 the other end and The grid of metal-oxide-semiconductor Q1, the drain electrode of metal-oxide-semiconductor Q1 meet power supply+5V, one end and two poles of the source electrode connecting resistance R8 of metal-oxide-semiconductor Q1, resistance R9 The anode of pipe D3, another termination signal projector E1 of resistance R9.

3. the three-dimensional imaging inspection apparatus of dept. of radiology as claimed in claim 2, which is characterized in that the filtering output circuit packet Include transport and placing device AR5, cathode, one end of resistance R22 and the hair of triode Q5 of the homophase input termination diode D3 of transport and placing device AR5 Emitter-base bandgap grading, one end of the anti-phase input terminating resistor R23 of transport and placing device AR5, the other end ground connection of resistance R23, the output of transport and placing device AR5 The other end of terminating resistor R22 and one end of resistance R24, one end of capacitor C10 and inductance L1, another termination electricity of inductance L1 Hinder R25, capacitor C11 one end, another termination signal output port of resistance R25, resistance R24, capacitor C10, capacitor C11 it is another One end ground connection.

4. the three-dimensional imaging inspection apparatus of dept. of radiology as described in claim 1, which is characterized in that the frequency collection circuit 1 Power supply termination power+the 5V of frequency collection device J1 including model SJ-ADC, frequency collection device J1, frequency collection device J1's connects Ground terminal ground connection, the cathode of frequency collection device J1 output termination voltage-stabiliser tube D1 and one end of resistance R1, the plus earth of voltage-stabiliser tube D1, One end of another termination capacitor C1 of resistance R1, diode D4 anode, the other end ground connection of capacitor C1；

The frequency collection circuit 2 includes the frequency collection device J2 of model SJ-ADC, and the power supply of frequency collection device J2 terminates electricity The ground terminal of source+5V, frequency collection device J2 are grounded, and frequency collection device J2 exports the cathode and resistance R10 for terminating voltage-stabiliser tube D2 One end, the plus earth of voltage-stabiliser tube D2, one end of another termination capacitor C3 of resistance R10, triode Q3 base stage, capacitor C3's Other end ground connection.