Novel multifunctional die body for verifying optical field consistency of cyber knife

Abstract

The utility model relates to a novel multifunctional mold body for verifying the consistency of the optical field of a wave knife, which comprises a mold body, and the mold body comprises an upper water equivalent material mold body layer, a lower water equivalent material mold body layer and a transparent plastic layer which are sequentially arranged from top to bottom, vertical holes are formed in the centers of the upper water equivalent material mold body layer and the lower water equivalent material mold body layer, a vertical marking line is arranged on the center axis of the transparent plastic layer, and a function groove for verifying the perpendicularity of the laser lamp is formed in the upper surface of the upper water equivalent material mold body layer. The center position of the upper surface of the lower-layer water equivalent material die body layer is provided with a visual error concentric circle scale, a customized EBT film is arranged between the upper-layer water equivalent material die body layer and the lower-layer water equivalent material die body layer, and the center of the customized EBT film is provided with a laser center mark point. According to the utility model, tools for testing the consistency of the optical field of the cyber knife are integrated on one die body, so that the complexity of needing a plurality of tools or apparatuses is avoided; and personal errors brought in in the testing process are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of quality assurance and quality control of the CyberKnife, and particularly relates to a new multifunctional phantom for verifying the consistency of the light field of the CyberKnife. BACKGROUND

[0002] The CyberKnife (CyberKnife) of the tumor stereoscopic directional radiotherapy equipment has a large single ray dose in the radiotherapy process of the tumor, and the position precision requirement is strict, so that the physical quality control requirement of the equipment is also very strict. In the quality assurance and quality control process of the CyberKnife, there is a QA test: X-ray beam and laser lamp center axis consistency test, the matching degree of the X-ray beam center axis position of the CyberKnife and the visually confirmed laser lamp center axis is compared to ensure the precision of the ray angle, direction and mechanical arm walking position in the treatment process, so as to ensure the accuracy of the treatment of the patient.

[0003] At present, the following problems exist in the mode and material used for the test:

[0004] 1. The operator needs to prepare a variety of materials for testing: such as water, water container for adjusting the perpendicularity of the robot accelerator head; marker pen for marking the position of the laser point; solid water phantom for building the ray building area; cutting EBT type film for ray area collection to determine the ray center axis position.

[0005] 2. There are human error links: manually marking the position of the laser lamp with a marker pen, the marking point is sometimes too large, sometimes too small, and there is also an error between the marking point and the position of the laser lamp.

[0006] 3. Only the film analysis software can quantify the error value, and there is no direct error determination tool. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims at solving the shortage of the prior art, and provides a new multifunctional phantom for verifying the consistency of the light field of the CyberKnife.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] The utility model provides a kind of new multifunctional phantom for verifying linac light field consistency, including phantom body, phantom body includes upper layer water equivalent material phantom layer, lower layer water equivalent material phantom layer and transparent plastic layer sequentially from top to bottom, the central position of upper layer water equivalent material phantom layer, lower layer water equivalent material phantom layer is equipped with vertical hole, and the central axis of transparent plastic layer is equipped with vertical mark line, and the corner of upper layer water equivalent material phantom layer upper surface is equipped with verifying laser light verticality function recess, and the front side of upper layer water equivalent material phantom layer upper surface is equipped with X direction horizontal adjustment instruction component and left side is equipped with Y direction horizontal adjustment instruction component, and the bottom of transparent plastic layer is equipped with several screw foot component, and the central position of upper layer water equivalent material phantom layer, lower layer water equivalent material phantom layer upper surface is equipped with visual error concentric circle scale, and the center of customized EBT film between upper layer water equivalent material phantom layer, lower layer water equivalent material phantom layer is equipped with laser center mark point.

[0010] The upper surface of the lower layer water equivalent material phantom layer is symmetrically provided with two wedge-shaped positioning blocks on the left and right sides of the front side, and the lower surface of the upper layer water equivalent material phantom layer is symmetrically provided with wedge-shaped positioning grooves on the left and right sides of the front side, and the wedge-shaped positioning blocks are arranged in the corresponding wedge-shaped positioning grooves.

[0011] The upper surface of the lower layer water equivalent material phantom layer is provided with a positioning column, and the lower surface of the upper layer water equivalent material phantom layer is provided with a positioning hole, and the positioning column is installed in the positioning hole.

[0012] The density of the upper layer water equivalent material phantom layer and the lower layer water equivalent material phantom layer is 1.0 g / cm 3 .

[0013] The upper surface of the phantom body is provided with a cross-shaped mark line, and each of the four side walls of the phantom body is provided with a vertical alignment line corresponding to the cross-shaped mark line.

[0014] The size of the upper layer water equivalent material phantom layer is 12 cm x 12 cm x 2 cm, and the size of the lower layer water equivalent material phantom layer is 12 cm x 12 cm x 4 cm.

[0015] The size of the transparent plastic layer is 12 cm x 12 cm x 1.5 cm.

[0016] The diameter of the vertical hole is 0.2 mm.

[0017] The size of the verifying laser light verticality function recess is 1.5 cm x 1.5 cm x 1 cm.

[0018] The utility model discloses a beneficial effect is: the utility model discloses the tool of the light field consistency test of radome is integrated to a mould, avoids the trouble of needing multiple tools or equipment;Avoid the human error of bringing in the testing process, such as the position of the center point of laser lamp on the film marked by artificial use of marker pen;Mould has multiple tool auxiliary position and quick adjustment, makes the mould position process more accurate and simple. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structural schematic diagram of the utility model;

[0020] Figure 2 It is the schematic diagram of the surface visual error concentric circle scale of the lower water equivalent material mould layer;

[0021] Figure 3 It is the structural schematic diagram of the customized EBT film;

[0022] Figure 4 It is the result analysis schematic diagram;

[0023] In the drawing: 1-the upper layer water equivalent material mould layer;2-the lower layer water equivalent material mould layer;3-the transparent plastic layer;4-the vertical hole;5-the vertical mark line;6-verify laser lamp vertical function recess;7-X direction horizontal adjustment indication component;8-Y direction horizontal adjustment indication component;9-screw foot component;10-visual error concentric circle scale;11-customized EBT film;12-laser center mark point;13-wedge positioning block;14-positioning column;15-cross mark line;16-vertical alignment line;

[0024] The utility model will be described in detail below with reference to the embodiment of the utility model and accompanying drawings. DETAILED DESCRIPTION

[0025] The principles and features of the utility model will be described below in conjunction with the accompanying drawings. The examples are used to explain the utility model and are not used to limit the scope of the utility model. In the following paragraphs, the utility model is described in more detail with examples. According to the following description, the advantages and features of the utility model will be more clear. It should be noted that the drawings are very simplified and use non-precise proportions, only to facilitate, clear and assist in explaining the purpose of the utility model examples.

[0026] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0029] A novel multifunctional phantom for verifying the consistency of the optical field of a wave-scalpel, such as Figures 1 to 3 As shown, the device includes a mold body, which comprises an upper water equivalent material mold layer 1, a lower water equivalent material mold layer 2, and a transparent plastic layer 3 arranged sequentially from top to bottom. Vertical holes 4 are provided at the center of the upper and lower water equivalent material mold layers 1 and 2. A vertical marking line 5 is provided along the central axis of the transparent plastic layer 3. A vertical groove 6 for verifying the verticality of the laser lamp is provided at one corner of the upper surface of the upper water equivalent material mold layer 1. An X-direction horizontal adjustment indicator component 7 is provided on the front side of the upper surface of the upper water equivalent material mold layer 1, and a Y-direction horizontal adjustment indicator component 8 is provided on the left side. Several screw support components 9 are provided at the bottom of the transparent plastic layer 3. A concentric circle scale 10 for visual error is provided at the center of the upper surface of the lower water equivalent material mold layer 2. A customized EBT film 11 is provided between the upper and lower water equivalent material mold layers 1 and 2, and a laser center mark point 12 is provided at the center of the customized EBT film 11.

[0030] Two wedge-shaped positioning blocks 13 are symmetrically arranged on the front side of the upper surface of the lower water equivalent material phantom layer 2, and wedge-shaped positioning grooves are symmetrically arranged on the front side of the lower surface of the upper water equivalent material phantom layer 1. The wedge-shaped positioning blocks 13 are set in the corresponding wedge-shaped positioning grooves.

[0031] The upper surface of the lower water equivalent material phantom layer 2 is provided with positioning posts 14, and the lower surface of the upper water equivalent material phantom layer 1 is provided with positioning holes, with the positioning posts 14 installed in the positioning holes.

[0032] The density of the upper water equivalent material phantom layer 1 and the lower water equivalent material phantom layer 2 is 1.0 g / cm 3 .

[0033] The upper surface of the phantom body is provided with a cross-shaped marking line 15, and each of the four side walls of the phantom body is provided with a vertical alignment line 16 corresponding to the cross-shaped marking line 15, which is used for positioning.

[0034] The center of the customized EBT film 11 is a laser center marking point 12, and the surrounding notches and holes are matched with the wedge-shaped positioning block 13 and the positioning column 14, so that the user can quickly and efficiently place the customized EBT film 11. The opening of the customized EBT film 11 is also customized and cut according to the phantom, and the surrounding notches can prevent misplacement.

[0035] The size of the upper water equivalent material phantom layer 1 is 12 cm x 12 cm x 2 cm, and the size of the lower water equivalent material phantom layer 2 is 12 cm x 12 cm x 4 cm.

[0036] The size of the transparent plastic layer 3 is 12 cm x 12 cm x 1.5 cm.

[0037] The diameter of the vertical hole 4 is 0.2 mm, which is used to confirm that the position of the laser lamp matches the vertical hole 4 of the phantom.

[0038] The size of the verification laser lamp verticality function groove 6 is 1.5 cm x 1.5 cm x 1 cm.

[0039] The X-direction horizontal adjustment indicating component 7 and the Y-direction horizontal adjustment indicating component 8 can be achieved by using a bubble level instrument or the like.

[0040] The specific technical scheme is implemented as follows:

[0041] Step one: use the verification laser lamp verticality function groove 6 to determine the perpendicularity of the cyberknife laser lamp;

[0042] Add pure water / distilled water / tap water in the verification laser lamp verticality function groove 6, place it on the treatment bed, move the cyberknife head to the detection position, turn on the laser lamp, and project the light point on the water surface in the verification laser lamp verticality function groove 6. Observe the reflected laser point on the horizontal plane, and fine-tune the cyberknife mechanical arm until the reflected laser point coincides with the emitting position.

[0043] Step two: open the upper water equivalent material phantom layer 1 and the lower water equivalent material phantom layer 2, place the customized EBT film 11 between the two layers, and mark the direction.

[0044] Step three: place the phantom in the corresponding position, source skin distance SSD = 800mm, through the horizontal adjustment screw foot assembly 9, combined with the horizontal indication of the X direction horizontal adjustment indication assembly 7 and the Y direction horizontal adjustment indication assembly 8, the phantom is adjusted to be horizontally placed; at the same time, the laser is vertically through the center vertical hole 4 of the phantom, and the center axis vertical mark line 5 of the transparent plastic layer 3 is overlapped.

[0045] Step four: use the specified size circular collimator to emit 800MU respectively.

[0046] Step five: open the upper water equivalent material phantom layer 1 and the lower water equivalent material phantom layer 2, according to the deviation of the circular field edge of the customized EBT film 11 and the visual error concentric circle scale 10 on the phantom, as shown in the figure Figure 4 The deviation of the laser lamp center and the beam center can be estimated.

[0047] Step six: repeat steps two to five with source skin distance SSD = 1600mm.

[0048] Step seven: according to the results of SSD = 800mm and SSD = 1600mm, determine whether the deviation is within the allowable range, so as to carry out subsequent adjustment.

[0049] The utility model has the following advantages:

[0050] 1, the tool of the cyberknife light field consistency test is integrated into a phantom, which avoids the complexity of needing multiple tools or equipment.

[0051] 2, avoid human error in the test process, such as manually marking the position of the laser lamp center on the film with a marker pen.

[0052] 3, there are multiple tools in the phantom to assist in positioning and rapid adjustment, so that the phantom positioning process is more accurate and simple.

[0053] 4, a visual estimation method of deviation result is provided, which provides a rapid analysis method for the test process.

[0054] The utility model has been described above in conjunction with the drawings, and obviously, the specific implementation of the utility model is not limited by the above method, as long as various improvements are adopted by using the method concept and technical scheme of the utility model, or direct application in other fields without improvement, which is within the protection scope of the utility model.

Claims

1. A new multi-functional phantom for verifying the consistency of the CyberKnife light field, characterized in that, The utility model relates to a laser light verticality verification device, including the body of mould, the body of mould includes upper layer water equivalent material mould layer (1) from top to bottom, lower layer water equivalent material mould layer (2) and transparent plastic layer (3) of setting in proper order, the central position of upper layer water equivalent material mould layer (1), lower layer water equivalent material mould layer (2) is equipped with vertical hole (4), and the central axis of transparent plastic layer (3) is equipped with vertical mark line (5), and the corner of upper layer water equivalent material mould layer (1) upper surface is equipped with the verification laser light verticality function recess (6) of verifying, and the front side of upper layer water equivalent material mould layer (1) upper surface is equipped with X direction horizontal adjustment instruction subassembly (7) and is equipped with Y direction horizontal adjustment instruction subassembly (8) left side, and the bottom of transparent plastic layer (3) is equipped with a plurality of screw foot subassembly (9), and the central position of upper layer water equivalent material mould layer (1) upper surface is equipped with visual error concentric circle scale (10), and the between of upper layer water equivalent material mould layer (1), lower layer water equivalent material mould layer (2) is equipped with the customization EBT film (11), and the center of customization EBT film (11) is equipped with laser center mark point (12).

2. A new multi-functional phantom for verifying the consistency of the light field of CyberKnife according to claim 1, characterized in that, The upper surface of the lower layer water equivalent material mould layer (2) is provided with two wedge-shaped positioning blocks (13) symmetrically arranged on the left and right sides of the front side, and the lower surface of the upper layer water equivalent material mould layer (1) is provided with wedge-shaped positioning grooves symmetrically arranged on the left and right sides of the front side, and the wedge-shaped positioning blocks (13) are arranged in the corresponding wedge-shaped positioning grooves.

3. A new multi-functional phantom for verifying the consistency of the light field of CyberKnife according to claim 2, characterized in that, The upper surface of the lower layer water equivalent material mould layer (2) is provided with a positioning column (14), and the lower surface of the upper layer water equivalent material mould layer (1) is provided with a positioning hole, and the positioning column (14) is installed in the positioning hole.

4. A new multi-functional phantom for verifying the consistency of the light field of CyberKnife according to claim 3, characterized in that, The density of the upper water equivalent material phantom layer (1) and the lower water equivalent material phantom layer (2) is 1.0 g / cm 3 .

5. A new multi-functional phantom for verifying the consistency of the light field of CyberKnife according to claim 4, characterized in that, The upper surface of the body of mould is provided with a cross-shaped mark line (15), and each of the four side walls of the body of mould is provided with a vertical alignment line (16) corresponding to the cross-shaped mark line (15).

6. A new multi-functional phantom for verifying the consistency of the light field of CyberKnife according to claim 5, characterized in that, The size of the upper layer water equivalent material mould layer (1) is 12cm×12cm×2cm, and the size of the lower layer water equivalent material mould layer (2) is 12cm×12cm×4cm.

7. A new multi-functional phantom for verifying the consistency of the light field of a CyberKnife according to claim 6, characterized in that, The size of the transparent plastic layer (3) is 12cm×12cm×1.5cm.

8. A new multi-functional phantom for verifying the consistency of the light field of CyberKnife according to claim 7, characterized in that, The diameter of the vertical hole (4) is 0.2mm.

9. A new multi-functional phantom for verifying the consistency of the light field of CyberKnife according to claim 8, characterized in that, The size of the verification laser light verticality function recess (6) is 1.5cm×1.5cm×1cm.

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