CN203138520U - Image-guided radiation treatment quality assurance model - Google Patents
Image-guided radiation treatment quality assurance model Download PDFInfo
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- CN203138520U CN203138520U CN 201220613656 CN201220613656U CN203138520U CN 203138520 U CN203138520 U CN 203138520U CN 201220613656 CN201220613656 CN 201220613656 CN 201220613656 U CN201220613656 U CN 201220613656U CN 203138520 U CN203138520 U CN 203138520U
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Abstract
The utility model discloses a model which can verify the accuracy of image-guided radiation treatment system location. In the three-dimensional space formed by a cuboid casing, three trabeculae perpendicular to the corresponding to side surfaces are arranged between each of the three group of parallel surfaces of upper/lower, left/right, and front/rear respectively, i.e., three trabeculae are perpendicular to the up/lower surface of the cuboid, three trabeculae are perpendicular to the left/right surface of the cuboid, three trabeculae are perpendicular to the front/rear surface of the cuboid; and a cross hair is arranged in the center of each surface, and length coordinate with minimal scale of 1mm is marked. Firstly, conventional sector fan beam CT is used to scan the model to obtain the plan image; secondly, onboard cone beam provided by a medical accelerator is used to scan the model to obtain treatment location image; and thirdly, matching the plan image and the treatment location image to obtain the location difference between the plan CT and the medical acceleration. Through moving accelerator treatment couch, the difference between the plan CT and the accelerator swing position is reduced; and meanwhile, the image observing guide system can correct the swing position error.
Description
1, affiliated technical field
This utility model relates to a kind of device for detection of image guided radiation therapy system pendulum bit error, especially detects the image guided radiation therapy system based on CT.
2, background technology
At present, image guided radiation therapy quality assurance job demand is used many kinds of die bodys, and the die body that has is made of the material of multiple known density, in order to detect low contrast resolution; The die body that has is to be made of the uniform commaterial of density, in order to detect density uniformity; What have only is the prill of a belt supporting frame, in order to detect the doctor repeatability at accelerator KV level system and MV level system center is arranged; The die body profile that has is similar to the people, and internal material is selected for use to the inside of human body level and knitted the similar material of density, wherein can the doubling sheet or place thermoluminescence dosage sheet or place the ionization chamber probe, and in order to detect radioactive dose.Radiotherapy based on the guiding of CT image, when image registration, general all images of show cross section plane, sagittal plane and coronalplane, easily observe on the cross sectional image of above-mentioned die body and know registration results, but know registration results difficult observation of the image of sagittal plane and coronalplane, knot detects the pendulum bit error and causes difficulty, causes misjudgment easily.
3, summary of the invention
For the pendulum bit error of detected image guided radiation treatment system easily and effectively, verify the reliability of its correction pendulum bit error, this utility model provides a kind of die body, this die body is through seeing simple in structure and die body structural images clearly from cross section, sagittal plane and coronalplane after CT scan, through registration plan CT image and pendulum position CT image, can measure the size of pendulum bit error; Mobile accelerator therapy bed (correcting the pendulum bit error) is observed the change in location of locating laser line on die body, can verify the ability of radiotherapy system correction pendulum bit error.
The technical scheme that its technical problem that solves this utility model adopts is: fix three girders respectively between three groups of opposites (top to bottom, left and right, front and rear) of cuboid shell, amount to 9 girders.Wherein three girders are vertical with bottom surface on the cuboid, and three girders are vertical with the cuboid left and right side, and three girders are vertical with the cuboid front-back.Center at each face of cuboid indicates " ten " word line, and 1 graduation mark of 1 millimeter mark at interval.Fladellum CT simulated positioner aim at the locating laser lamp cuboid left and right and above " ten " word line at center, scanning acquisition radiotherapy planning image.In planning system, set the irradiation center and be the intersection point of straight line of " ten " word line at the left and right and center, above and below of cuboid.Clinac aim at the locating laser lamp cuboid left and right and above " ten " word line at center, put bit image with airborne conical beam CT scanning cuboid acquisition radiotherapy.With image registration software contrast pendulum bit image and planning chart picture, the automatic alignment function that can adopt software to provide, the manual alignment function that also can adopt software to provide is found the pendulum bit error on vertical, horizontal and vertical direction.Because this utility model has designed three girders respectively on vertical, horizontal and vertical direction, so in the image that scanning obtains, no matter observe from cross section, coronalplane or sagittal plane, can both see the cross section of three girders, be conducive to improve the speed of registering images, improve the accuracy of registration.
The beneficial effects of the utility model are, simple in structure, processing easily, put convenience, firm at location CT and medical accelerator bed surface, no matter the image that obtains after scanning is observed from cross section, coronalplane or sagittal plane, can both see the cross section of three girders, be conducive to registering images, find error.
Description of drawings
Below in conjunction with drawings and Examples this utility model is further specified.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is barment tag sketch map of the present utility model.There is the length scale at each outer surface center.
Fig. 3 is that this utility model is through the planning chart picture of location CT scan.
Fig. 4 is that this utility model is through the pendulum bit image of taper speed CT scan and the figure as a result of plan image registration
The specific embodiment
In Fig. 1, show the internal structure of die body: left and right directions has 3 girders parallel to each other, and fore-and-aft direction has 3 girders parallel to each other, and above-below direction has 3 girders parallel to each other.
In Fig. 2, show that there is the length scale at each outer surface center.
Made a simple model according to above-mentioned feature.
Die body is placed on the CT bed surface of fladellum location, and laser lamp is aimed at " ten " word line at the die body left side, the right side and top center, scans then.
In Fig. 3, show that upper left is the mode cross section image through obtaining the planning chart picture after the CT scan of location, the lower-left is coronal image, the bottom right is the sagittal view picture.
Die body is placed on the medical accelerator bed surface, and laser lamp is aimed at " ten " word line at the die body left side, the right side and top center, scans with the conical beam CT of installing on the accelerator then.
In Fig. 4, show the pendulum bit image of acquisition after conical beam CT scanning and the registration results of planning chart picture.
Claims (3)
1. termed image-guided radiotherapy quality assurance die body, in the die body shell, about, fixed three girders respectively on front and back and the above-below direction, it is characterized in that: unidirectional girder is parallel to each other, the girder of different directions is orthogonal.
2. termed image-guided radiotherapy quality assurance die body according to claim 1 is characterized in that: observe the image that die body obtains after by CT scan, no matter from the still sagittal plane observation of cross section, coronalplane, can both see the cross section of three girders.
3. termed image-guided radiotherapy quality assurance die body according to claim 1 is characterized in that: the center at six faces of up, down, left, right, before and after of die body shell indicates " ten " word line, and has and be spaced apart 1 millimeter scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613656 CN203138520U (en) | 2012-11-20 | 2012-11-20 | Image-guided radiation treatment quality assurance model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613656 CN203138520U (en) | 2012-11-20 | 2012-11-20 | Image-guided radiation treatment quality assurance model |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203138520U true CN203138520U (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220613656 Expired - Fee Related CN203138520U (en) | 2012-11-20 | 2012-11-20 | Image-guided radiation treatment quality assurance model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203138520U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102908160A (en) * | 2012-11-20 | 2013-02-06 | 新疆医科大学附属肿瘤医院 | Image guidance radiotherapy quality assurance die body |
| CN111836665A (en) * | 2019-02-21 | 2020-10-27 | 西安大医集团股份有限公司 | Radiotherapy system and verification device and verification method thereof |
-
2012
- 2012-11-20 CN CN 201220613656 patent/CN203138520U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102908160A (en) * | 2012-11-20 | 2013-02-06 | 新疆医科大学附属肿瘤医院 | Image guidance radiotherapy quality assurance die body |
| CN111836665A (en) * | 2019-02-21 | 2020-10-27 | 西安大医集团股份有限公司 | Radiotherapy system and verification device and verification method thereof |
| US11819711B2 (en) | 2019-02-21 | 2023-11-21 | Our United Corporation | Radiotherapy system, and device and method for verifying same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20161120 |