JP2017169678A - Body surface fixing tool creation support device, body surface fixing tool creation support method, and body surface fixing tool creation support program - Google Patents

Abstract

The present invention is based on medical image data obtained by imaging a subject and does not depend on the skill of the creator for modeling a high-precision body surface fixture with a modeling machine without combining a plurality of software. Provided is a body surface fixing tool creation support device capable of easily obtaining unique three-dimensional shape data in a short time. A body surface fixing tool creation support apparatus according to the present invention includes an image data input means for acquiring CT image data of a subject, and three-dimensional shape data for a body surface fixing tool based on the CT image data. A body memory for creating a body surface fixture for non-contact digital processing, and a three-dimensional shape for the body surface fixture 11 by executing a series of processes based on the body surface fixture creation support program The image data processing means 5 for creating data, various image data including three-dimensional shape data, storage means 6 for storing fixture template data, and control means 2 for controlling these elements are included. [Selection] Figure 1

Description

  The present invention relates to a body surface fixing tool creation support apparatus, a body surface fixing tool creation support method, and a body surface fixing tool creation support program, and more specifically, based on medical image data obtained by imaging a subject, a plurality of software programs are provided. Body surface fixture creation support device, body surface fixture creation support method, and body that can easily obtain unique three-dimensional data for body surface fixtures that do not depend on the skill of the creator in a short time without being combined The present invention relates to a surface fixture creation support program.

  In recent years, the aging population and the incidence of cancer have increased, and the demand for radiation therapy has increased. In Japan, however, there is a shortage of medical workers who are responsible for radiation therapy.

  In addition, in order to perform radiotherapy safely and accurately, an auxiliary fixture for a subject (patient) is required, and the preparation thereof requires a precise and complicated manual process.

  That is, in the medical and nursing field, a conventional method for producing an auxiliary tool for fixing a target site of a subject maintains a posture for a certain period of time, for example, until a thermoplastic material is placed on the body surface and solidified. It was customary to form an auxiliary fixture by molding (shaping cast, etc.) and then to put this auxiliary fixture into practical use.

  In the past, several ready-made fixtures were prepared, and the one that fits the shape was selected and used. However, because it is not completely custom-made, the fixing accuracy is often not sufficient. It was.

  Recently, with the development of 3D printers, 3D images are used to create auxiliary tools for fixing the target part of a subject using a 3D printer, using the popular DICOM 3D modeler software and medical 3D image processing workstations. Attempts have also been made to generate data.

  However, DICOM 3D modeler software and medical 3D image processing workstations that have been widely used in the past have the function of extracting a target area in the viewer and outputting the surface image data to an STL file. The main purpose is to extract images of internal organs, digestive organs, blood vessels, bones, etc. from DICOM data.

  Therefore, since there is no function for shape processing that is necessary to fix the body surface, such as forming a hole in the entire fixture by applying a processing pattern, for example, a lattice pattern, a plurality of existing 3D modeler software is combined, There is a problem that it is necessary to devise troublesome arithmetic processing, and it is necessary to take a very complicated process before performing data processing for creating a body surface fixture.

  Patent Document 1 discloses a brace that supports a joint part in an operable manner, and includes a pair of fixing parts that are attached to a body part that is positioned around the joint in use and sandwiches the joints, and both the fixing parts. A connecting portion integrally formed with the fixing portion so as to be connected, a mounting site confirmation step, a data application step, a model construction step, a three-dimensional image data of the orthosis, and a flexible An orthosis formed by a 3D printer using a hard material having no property and a soft material having flexibility is disclosed.

  In Non-Patent Document 1, as shown in FIG. 10, after extracting a hand region from a CT image obtained by photographing a finger, the hand region is stored in another layer, and the voxel size is enlarged in consideration of one thickness of the sprint, Create a sprint source data if it is different from the original data saved separately, check the design and fixing restraint location first, and then cut from any image display or cross-sectional image that has been processed to overlap multiple layers A ring sprint creation method for designing a sprint and modeling with a 3D printer is disclosed.

  However, both the device of Patent Document 1 and the ring splint of Non-Patent Document 1 include a problem that solid shape data cannot be created unless a lot of time and processes are applied in a complicated method combining a plurality of software. ing.

Japanese Patent Laying-Open No. 2015-53950

Inner Vision Co., Ltd., Ringsprint creation method (October 2014) (http://www.innervision.co.jp/ad/suite/aze/jisedai/150)

  The present invention was developed in view of the above-described conventional circumstances, and based on medical image data obtained by imaging a subject, a high-precision body surface fixture is modeled by a modeling machine without combining a plurality of software. A body surface fixture creation support device, a body surface fixture creation support method, and a body surface fixture creation support program that can easily obtain unique three-dimensional shape data that does not depend on the skill of the creator to perform in a short time It aims to be realized and provided.

  The body surface fixing device creation support device according to the present invention includes an image data input means for acquiring medical image data obtained by imaging a subject, and an extraction process of body surface outermost contour line data based on the acquired medical image data. Processing for creating body surface outermost contour line data, processing for creating target part outermost contour data, process for creating target part concave part data based on the target part outermost part data, fixture template data shape for the target part concave part data And a program memory storing a body surface fixing tool creation support program for performing processing for creating three-dimensional shape data for the body surface fixing tool, and medical image data acquired based on the body surface fixing tool creation support program Based on the above, image data processing means for executing a series of processes to create solid shape data for the body surface fixture, and various images including the solid shape data Data, storage means for storing the fasteners template data, and control means for controlling these elements, the most important feature in that it has.

  According to the first to fourth aspects of the present invention, a series of processes up to the creation of high-accuracy 3D shape data for a body surface fixture based on medical image data of a subject without combining a plurality of software, It is possible to realize and provide a body surface fixture creation support device that can be automatically performed by a non-contact type digital creation method and can secure the security of three-dimensional shape data.

  According to the inventions of claims 5 to 8, a series of processes up to the creation of high-precision body shape fixture data for body surface fixtures based on medical image data of a subject without combining a plurality of software, It is possible to realize and provide a body surface fixture creation support method that can be automatically performed by a non-contact type digital creation method and can secure the security of three-dimensional shape data.

  According to invention of Claim 9 thru | or 12, based on the medical image data which image | photographed the test object, it is a series of for modeling a highly accurate body surface fixing tool with a modeling machine, without combining several software. Provided is a body surface fixture creation support program that can easily and automatically execute 3D shape data creation processing and realize the above-described body surface fixture creation support device and body surface fixture creation support method. can do.

FIG. 1 is a schematic block diagram showing the configuration of a body surface fixture creation support apparatus according to an embodiment of the present invention. FIG. 2 is a flowchart showing the flow of processing of the body surface fixture creation support method using the body surface fixture creation support device according to this embodiment. FIG. 3 is an image diagram of CT image (DICOM image) data, which is medical image data of a target region of a subject in the present embodiment. FIG. 4 is an image image showing the flow of the body surface outermost contour line extraction process, the blurring process, and the threshold process based on the CT image data by the body surface fixture creation support program according to the present embodiment. FIG. 5 is an image of the body surface outermost shape data (convex image data) obtained from the body surface outermost shape line data after the threshold processing by the body surface fixture creation support program according to the present embodiment. FIG. 6 shows the body surface outer shape data necessary to obtain the three-dimensional shape data for creating the body surface fixture based on the body surface outer shape data (convex data) by the body surface fixture creation support program according to the present embodiment. It is an image which shows the flow of the process of 4 steps | paragraphs with respect to. FIG. 7 shows a five-step process flow for obtaining three-dimensional shape data for creating the body surface fixture based on the body surface outermost shape data after the four-step process by the body surface fixture creation support program according to this embodiment is completed. It is the image image which shows. FIG. 8 is a schematic view showing a body surface fixture modeled by three-dimensional shape data for body surface fixture creation created based on the body surface fixture creation support program according to the present embodiment. FIG. 9 is a schematic view showing a use state of the modeled body surface fixture. FIG. 10 is a schematic diagram showing a ring sprint creation process disclosed in Non-Patent Document 1 as a conventional example.

  The present invention is based on medical image data obtained by imaging a subject, and is a unique three-dimensional object that does not depend on the skill of the creator for modeling a high-precision body surface fixture with a modeling machine without combining a plurality of software. For the purpose of realizing and providing a body surface fixing device creation support device capable of easily obtaining shape data in a short time, image data input means for acquiring medical image data obtained by imaging a subject, and acquired medical image data Based on the above, the extraction process of the body surface outermost line data, the process of creating the body surface outermost line data, the process of creating the target part outermost line data, the target part recess data based on the target part outermost shape data The fixture template data shape obtained by setting at least one of thickness, interval, shape pattern, rounding radius, and smoothness to the target part recess data is appropriately applied. Then, based on the acquired medical image data based on the program memory storing the body surface fixing tool creation support program for performing the process of creating the three-dimensional shape data for the body surface fixing tool, and the body surface fixing tool creation support program The image data processing means for executing a series of processing and creating solid shape data for the body surface fixture, various image data including the solid shape data, storage means for storing fixture template data, and each of these And a control means for controlling the elements.

  Hereinafter, a body surface fixture creation support apparatus, a body surface fixture creation support method, and a body surface fixture creation support program according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the body surface fixing tool creation support apparatus 1 according to the present embodiment includes a control means 2 that performs overall control, an overall operation program, and a body surface fixing tool creation support program according to the present embodiment. Based on the installed program memory 3, image data input means 4 for inputting CT image (DICOM image) data, and a series of image data processing based on the body surface fixture creation support program, the body surface fixture for creation Image data processing means 5 for creating three-dimensional shape data, storage means 6 for storing various image data, fixture template data (STL (Standard Template Library) data) and the like, and input means 7 such as a keyboard for performing various input operations And an output interface for outputting three-dimensional shape data to a display unit 8 including a liquid crystal display and the like and a modeling machine 10 such as a 3D printer. 9.

  The program memory 3 performs body surface outermost line data extraction processing, blurring processing, and threshold processing based on CT image (DICOM image) data, which is medical image data of the target region of the subject, and performs the body surface outermost contour line. A process of creating data, a process of creating target part outer contour data (convex image data) based on the body surface outer contour line data, and applying polygon mesh processing to the target part outer contour data (convex image data) Processing for creating the target part recess data, applying the fixture template data shape stored in advance to the target part recess data, creating the three-dimensional shape data, and encrypting the three-dimensional shape data It is equipped with a body surface fixture creation support program that automatically executes processing.

  Next, the body surface fixture creation support method by the body surface fixture creation support apparatus 1 will be described in detail with reference to FIGS.

  First, as shown in FIG. 2, a CT image (DICOM image) as shown in FIG. 3, which is medical image data obtained by imaging the target region of the subject by the image data input means 4 of the body surface fixture preparation support device 1. Get the data.

  Next, as shown in FIGS. 2 and 4, the image data processing means 5 is operated based on the acquired body surface outermost contour line data, and the body surface outermost contour line data is obtained by the body surface fixing tool creation support program. Gaussian blurring processing and threshold processing are performed on, to generate expanded surface data.

  That is, inflated surface data is created by performing Gaussian blurring processing on the body surface outermost contour line data and then inflating by a distance set uniformly from the body surface by threshold processing.

  Furthermore, target part outer shape data (convex image data) as shown in FIG. 5 is created by the Marching Cubes method.

  In the threshold process described above, a bed or other unnecessary areas may be deleted or an airway such as a nose / throat may be filled as necessary.

  Next, as shown in FIGS. 2, 6, and 7, three-dimensional shape data for the body surface fixture 11 is created based on the target part outer shape data (convex image data).

  That is, a pair of fixed parts created and stored in advance by the 3DCG creation program Metasequia (http://www.metaseq.net/jp/) by the body surface fixture creation support program is displayed on the screen of the display means 8 ( 6 (a)), target part outer shape data (convex image data) is arranged (FIG. 6 (b)).

  Then, the direction and position of the target part outer shape data (convex image data) are adjusted (FIG. 6C), and the occipital region from the root of the target part outer shape data (convex image data) to the occipital region is a pair of fixed parts. In this state, the target part outer shape data (convex image data) is stretched upward (FIG. 6D).

  Next, polygon mesh processing is performed on the target part outer shape data (convex image data) stretched by the body surface fixture creation support program.

  That is, a cylindrical polygon mesh that wraps the head is added to the stretched target part outermost shape data (convex image data) (FIG. 7A), and then the cylindrical polygon mesh is added to the outer surface of the head. The wrapping process is performed so as to cover (Fig. 7 (b)), and the connecting portion between the side edges of the wrapping polygon and the pair of fixed parts is adjusted (Fig. 7 (c)), and one polygon at a time. A large number of holes of a predetermined size are processed to obtain target portion recess data (FIG. 7D).

  Then, applying at least one fixture template data of thickness, interval, shape pattern, rounding radius, smoothness to the target portion recess data, and adding arbitrary shape data as required, The three-dimensional shape data for the body surface fixture 11 is created (FIG. 7E).

  For example, by designating a specific position and radius in the three-dimensional shape data, an area within several centimeters is deleted, or a mask portion near the nose position is deleted to facilitate breathing.

  Further, the body surface fixture creation support program performs an encryption process for ensuring the security of the solid shape data created by the above-described series of processing, and stores the encrypted solid shape data in the storage means 6. Then, this three-dimensional shape data is output to the modeling machine 10 such as a 3D printer as necessary, and the body surface fixture 11 is modeled.

  The series of processes described above can be performed by adjusting parameters while confirming the results at each step.

  FIG. 8 shows a body surface fixture 11 modeled by the modeling machine 10 based on the three-dimensional shape data created by the above-described body surface fixture creation support method.

  Moreover, the actual use condition of the modeled body surface fixture 11 is shown in FIG.

  The three-dimensional shape data described above is output as surface data (three-dimensional structure data in which only the surface is defined) such as an STL file and transferred to a 3D printer, or saved in a DICOM file as volume data. 3D printers (such as stereolithography machines) that can be transferred to a picture archiving and communication system (Picture Archiving and Communication Systems) or output as serial image files (BMP / PNG format, etc.) as volume data and received in that format ).

  According to the body surface fixing tool creation support apparatus 1 and the body surface fixing tool creation support method of the present embodiment described above, up to the creation of the three-dimensional shape data for the body surface fixing tool 11 based on the medical image data of the subject. The high-quality body surface fixture 11 can be automatically performed without combining a plurality of software, steadily fits the body shape of each subject, and supports medical care and nursing care. It becomes possible to prepare an environment in which modeling by the machine 10 can be made in a custom-made manner.

  Moreover, according to the body surface fixing tool creation support apparatus 1 and the body surface fixing tool creation support method of the present embodiment, in order to create the body surface fixing tool 11, the creation material is directly fixed to the body while being soft, It is possible to switch from the conventional contact creation analog creation method of waiting in a state until solidification to a non-contact digital creation method, and the physical and time required for creating the body surface fixture 11 in the subject. Burden can be reduced.

  Furthermore, according to the body surface fixing tool creation support device 1 and the body surface fixing tool creation support method of the present embodiment, the body shape fixing data creation process for the body surface fixing tool 11 is all digitized, so that the body It is possible to manage the three-dimensional shape data for the surface fixture 11 in a database, efficient secondary use such as creation of the necessary body surface fixture 11 when necessary, accuracy of the body surface fixture 11, etc. It is possible to produce an effect that the verification becomes easier.

  In addition, according to the body surface fixing tool creation support device 1 and the body surface fixing tool creation support method of the present embodiment, the medical / care assisting fixing tool such as the high-quality body surface fixing tool 11 described above is efficiently used. By creating automatically well, it is possible to reduce the burden on the medical / caregiver side and solve the medical resource problem.

  Furthermore, according to the present embodiment, a series of solids for modeling the high-precision body surface fixture 11 by the modeling machine 10 without combining a plurality of software based on medical image data obtained by imaging the subject. It is possible to provide a body surface fixture creation support program that can easily execute a shape data creation process and can realize the body surface fixture creation support apparatus 1 and the body surface fixture creation support method that achieve the above-described effects. it can.

  The present invention makes it possible to select template data of tools to be used for various purposes, so that various auxiliary fixtures for high-quality medical / nursing care such as the body surface fixture 11 described above, orthopedic casts, etc. In addition, the present invention can be widely applied to applications for automatically creating various other tools and the like without requiring the skill of the creator.

DESCRIPTION OF SYMBOLS 1 Body surface fixing tool creation assistance apparatus 2 Control means 3 Program memory 4 Image data input means 5 Image data processing means 6 Storage means 7 Input means 8 Display means 9 Output interface 10 Modeling machine 11 Body surface fixing tool

Claims (12)

Image data input means for acquiring medical image data obtained by imaging a subject;
Based on the acquired medical image data, the extraction process of the body surface outermost line data, the process of creating the body surface outermost line data, the process of creating the target part outermost line data, based on the target part outermost line data A program storing a body surface fixture creation support program for creating target part recess data, applying a fixture template data shape to the target part recess data, and creating three-dimensional shape data for body surface fixtures Memory,
Based on the body surface fixing tool creation support program, image data processing means for executing a series of processes based on the acquired medical image data and creating three-dimensional shape data for the body surface fixing tool;
Storage means for storing various image data including the three-dimensional shape data, fixture template data;
Control means for controlling each of these elements;
A body surface fixing tool creation support apparatus characterized by comprising:   The body surface fixture creation support apparatus according to claim 1, wherein the fixture template data shape is obtained by setting at least one of thickness, interval, shape pattern, rounding radius, and smoothness. . The body surface fixing tool creation support apparatus according to claim 1, further comprising a function of adding and deleting an arbitrary shape by setting a position and a shape in the three-dimensional shape data.   4. The body surface according to claim 1, wherein the body surface fixture creation support program further has a function of performing an encryption process that requires decryption on the three-dimensional shape data. 5. Fixture creation support device. Automatically extract body surface outermost contour data from the medical image data of the subject,
Create target part outer shape data that complements the body length direction range of the target part based on the body surface outermost line data,
Create the target part recess data in the polygon lapping process for the target part outer shape data,
Applying a fixture template data shape to the target part recess data to create three-dimensional shape data for a body surface fixture,
Storing the three-dimensional shape data for output to a modeling machine;
The body surface fixing tool creation support method characterized by the above-mentioned.   6. The body surface fixture creation support method according to claim 5, wherein the fixture template data shape is obtained by setting at least one of thickness, interval, shape pattern, rounding radius, and smoothness. .   The body surface fixing tool creation support method according to claim 5 or 6, further comprising a process of adding and deleting an arbitrary shape by further setting a position and a shape in the solid shape data.   The body surface fixing tool creation support method according to any one of claims 5 to 7, further comprising performing an encryption process that requires decryption on the three-dimensional shape data. Based on the medical image data of the subject,
Body surface outermost contour line data extraction processing, blurring processing, threshold processing to create body surface outermost contour line data,
Processing to create the target part outer contour data (convex data) based on the body surface outer contour line data;
A process of creating a target part recess data by applying polygon processing to the target part outer shape data;
Applying the fixture template data shape stored in advance to the target part recess data, processing to create three-dimensional shape data,
Is a computer-executable computer program for creating a body surface fixture.   The body surface fixture creation support program according to claim 9, wherein the fixture template data shape is obtained by setting at least one of thickness, interval, shape pattern, rounding radius, and smoothness. .   The body surface fixing tool creation support program according to claim 9 or 10, further comprising a process of adding and deleting an arbitrary shape by further setting a position and a shape in the three-dimensional shape data.   The body surface fixture creation support program according to any one of claims 9 to 11, further comprising an encryption process for encrypting the three-dimensional shape data.