CN211245250U - Simulation phantom body for testing image-guided radiotherapy positioning system - Google Patents
Simulation phantom body for testing image-guided radiotherapy positioning system Download PDFInfo
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- CN211245250U CN211245250U CN201921510204.4U CN201921510204U CN211245250U CN 211245250 U CN211245250 U CN 211245250U CN 201921510204 U CN201921510204 U CN 201921510204U CN 211245250 U CN211245250 U CN 211245250U
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Abstract
The utility model provides a emulation die body for image guide radiotherapy positioning system test, it includes: an upper die cavity which is inwards sunken is formed on the lower end surface of the upper die shell; the lower die shell is attached to the upper die shell, an inward-concave lower die cavity matched with the upper die cavity is formed on the lower end surface of the lower die shell, and the upper die cavity and the lower die cavity enclose a closed die cavity; the film square mould is removably filled in the mould cavity; the simulation spine mould is covered in the lower mould shell and is positioned below the film square mould, and a plurality of gold marks are arranged on the upper surface of the simulation spine mould. The utility model provides a simulation die body that is used for image guide radiotherapy positioning system to test is used for somatic part tumour patient's the position of waiting to radiate, uses the utility model provides a simulation die body can realize the test to image guide positioning system's precision and film.
Description
Technical Field
The utility model relates to the field of medical treatment, especially, relate to a emulation die body and preparation method for image guide radiotherapy positioning system test.
Background
Image-guided Radiation Therapy (IGRT) is a new tumor radiotherapy technology developed gradually in the last ten years, is a milestone dividing modern radiotherapy, and has been widely used in clinical practice at home and abroad. The image guide is through advanced image equipment and image processing method, to patient's target area before the treatment accurate position, track in the treatment, promote the radiotherapy precision, allow to shine the target area with higher dose, reduce the damage to the peripheral normal tissue of tumour and key organ, improve treatment. IGRT is the basis of modern precision radiotherapy techniques.
An image-guided radiotherapy positioning system (GPS) is one of the realization modes of IGRT technology, adopts kV-level X-ray three-dimensional planar imaging technology, controls two groups of X-ray imaging units which are symmetrical to a positioning central point through software, obtains X-ray projection images in two directions simultaneously, and performs positioning verification on a patient by utilizing the image characteristics of the internal anatomical structure of the patient. The product is used in combination with radiotherapy equipment to detect and correct the positioning error of the patient and verify the final residual positioning error of the patient.
Taking the positioning of breast tumor as an example, the image-guided radiotherapy positioning comprises the following steps: 1. carrying out normal initial positioning on the patient, and then carrying out exposure and image acquisition on the mammary gland of the patient by using an image guide positioning system; 2. carrying out image registration based on spine bony identification or rib bony identification of the patient, and calculating the positioning deviation of the patient, wherein the bony identification is generally a metal mark (a gold mark for short); 3. and controlling the treatment bed to move according to the swing deviation of the patient to correct the swing deviation.
Before image-guided radiotherapy is administered to a patient, the accuracy and film of the image-guided positioning system needs to be tested. The utility model aims at providing an emulation die body for image guide radiotherapy positioning system test in time, it is used for somatic part tumour patient's the position of waiting to radiate to the realization is to image guide positioning system's precision and the test of film.
SUMMERY OF THE UTILITY MODEL
In order to achieve the above object, the utility model provides a simulation die body for image guide radiotherapy positioning system test, its concrete technical scheme is as follows:
a simulated phantom for image-guided radiotherapy positioning system testing, comprising:
an upper die cavity which is inwards sunken is formed on the lower end surface of the upper die shell;
the lower die shell is attached to the upper die shell, an inward-concave lower die cavity matched with the upper die cavity is formed on the lower end surface of the lower die shell, and the upper die cavity and the lower die cavity enclose a closed die cavity;
the film square mould is removably filled in the mould cavity;
the simulation spine mould is covered in the lower mould shell and is positioned below the film square mould, and a plurality of gold marks are arranged on the upper surface of the simulation spine mould.
In some implementations, the upper and lower forms are each cast from plexiglass.
In some implementations, the simulated spine is 3D printed from a polytetrafluoroethylene material;
in some embodiments, the gold is labeled as spherical tungsten particles.
The utility model provides a simulation die body for image guide radiotherapy positioning system test, it is used for somatic part tumour patient's the position of waiting to radiate, uses the utility model provides a simulation die body can realize the test to image guide positioning system's precision and film.
Drawings
Fig. 1 is an assembly structure diagram of the simulation mold body of the present invention;
fig. 2 is a schematic view of the disassembled structure of the simulation mold body of the present invention;
FIG. 3 is a schematic structural view of an upper mold shell in the simulation mold body of the present invention;
fig. 4 is a schematic structural view of a lower mold shell in the simulation mold body of the present invention;
fig. 5 is a schematic view of the testing process of using the simulation phantom of the present invention to perform the test of the image-guided radiotherapy positioning system.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
The utility model discloses the first aspect provides a emulation die body that is used for image guide radiotherapy positioning system to test.
As shown in fig. 1 to 4, a simulation mold body 10 provided by the embodiment of the present invention includes an upper mold shell 11, a lower mold shell 12, a film square mold 13 and a simulation spine mold 14. Wherein: an upper cavity 111 is formed on the lower end surface of the upper mold shell 11 and is recessed inwards. The lower mold shell 12 is attached to the upper mold shell 11, an inward-recessed lower mold cavity 121 matched with the upper mold cavity 111 is formed on the lower end face of the lower mold shell 12, and the upper mold cavity 111 and the lower mold cavity 121 enclose a closed mold cavity. The film square 13 is removably stuffed in the mold cavity. The simulation spine mould 14 is covered in the lower mould shell 12 and is positioned below the film square mould 13, and a plurality of gold marks 15 are arranged on the surface of the simulation spine mould 14 facing the film square mould 13.
The simulated vertebral model 14 is identical to the shape and size of the vertebrae of the corresponding part of the target patient. In this embodiment, the artificial vertebral mold 14 is formed by 3D printing of a polytetrafluoroethylene material. The density of the polytetrafluoroethylene material is very close to that of human skeleton, so that the human vertebra can be simulated more truly.
In this embodiment, the upper mold cavity 111 and the lower mold cavity 121 are respectively formed of organic glass by a casting process and a molding process, and the upper mold 11 and the lower mold 12 are used for simulating human soft tissue of human vertebra covering the vertebra. The film square mould 13 is made of ABS material, and the gold mark 15 adopts spherical metal tungsten particles.
The simulation phantom provided by the embodiment is used for the part to be irradiated of the body tumor patient, and can realize the precision and film test of the image-guided positioning system.
Referring to fig. 5, in the testing process, the simulation phantom 10 of the present embodiment is positioned at the imaging center of the image-guided radiotherapy positioning system, and then started to the image-guided radiotherapy positioning system. The image-guided radiotherapy positioning system can complete the testing process by calling the self-contained testing program.
Of course, the test procedures and test procedures mentioned herein are not the subject of the present invention, and therefore the description of the test procedures and test procedures is not provided herein. The utility model discloses what first aspect protected only is the emulation die body of somatic part tumour patient's the position of waiting to radiate.
A second aspect of the present invention provides a method for manufacturing the simulation phantom 10 of the first aspect of the present invention. Which comprises the following steps:
pouring materials are poured into an upper pouring mold with a first preset structure, and after cooling and demolding, an upper mold cavity 111 is molded on the lower end face of a mold blank to obtain an upper mold shell 11.
The artificial vertebral mold 14 is preset in a lower casting mold having a second predetermined structure, then a casting material is cast in the lower casting mold to cover the artificial vertebral mold 14, and after cooling and demolding, a lower mold cavity 121 is molded out of the lower end surface of the mold blank to obtain the lower mold shell 12 covered with the artificial vertebral mold 14.
Gold mark holes are drilled at predetermined positions of the lower mold shell 12, and each gold mark hole extends from the surface of the lower mold shell 12 to the upper surface of the artificial vertebral mold 14.
The gold markers 15 are guided and positioned to the upper surface of the simulation vertebral mould 14 through the gold marker holes.
The film square mold 13 is placed in the upper mold cavity 111 of the upper mold shell 11 or the lower mold cavity 121 of the lower mold shell 12, and then the upper mold shell 11 and the lower mold shell 12 are attached until the film square mold 13 is stuffed in the closed mold cavity enclosed by the upper mold cavity 111 and the lower mold cavity 121. Thus, the preparation of the simulation phantom 10 is completed.
Optionally, the simulation spine mold 14 is formed by 3D printing of a polytetrafluoroethylene material, and the polytetrafluoroethylene material has a density very close to that of a human skeleton, so that the human spine can be simulated more realistically.
Optionally, the film square mold 13 is made of ABS material, the gold mark 15 is made of spherical metal tungsten particles, and the casting material is molten organic glass.
In order to prevent the gold marker 15 from falling off, it is preferable that the gold marker hole is filled and sealed with a pouring material after the gold marker 5 is guided and positioned from the gold marker hole to the upper surface of the artificial vertebral mould 14.
The invention has been described above with a certain degree of particularity and detail. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that may be made without departing from the true spirit and scope of the present invention are intended to be within the scope of the present invention. The scope of the invention is defined by the appended claims rather than by the foregoing description of the embodiments.
Claims (4)
1. A simulation phantom body for testing an image-guided radiotherapy positioning system is characterized by comprising:
an upper die cavity which is inwards sunken is formed on the lower end surface of the upper die shell;
the lower die shell is attached to the upper die shell, an inward-concave lower die cavity matched with the upper die cavity is formed on the lower end surface of the lower die shell, and the upper die cavity and the lower die cavity enclose a closed die cavity;
the film square mould is removably filled in the mould cavity;
the simulation spine mould is covered in the lower mould shell and is positioned below the film square mould, and a plurality of gold marks are arranged on the upper surface of the simulation spine mould.
2. The simulated mold body of claim 1, wherein said upper and lower mold shells are each cast from plexiglass.
3. The simulated phantom according to claim 1, wherein said simulated spine is 3D printed from a polytetrafluoroethylene material.
4. The simulated phantom according to claim 1, wherein said gold is represented by spherical tungsten particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921510204.4U CN211245250U (en) | 2019-09-11 | 2019-09-11 | Simulation phantom body for testing image-guided radiotherapy positioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921510204.4U CN211245250U (en) | 2019-09-11 | 2019-09-11 | Simulation phantom body for testing image-guided radiotherapy positioning system |
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| CN211245250U true CN211245250U (en) | 2020-08-14 |
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| CN201921510204.4U Active CN211245250U (en) | 2019-09-11 | 2019-09-11 | Simulation phantom body for testing image-guided radiotherapy positioning system |
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2019
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