A quality control phantom for heavy ion therapy and its testing method

Abstract

This invention discloses a quality control phantom for heavy ion therapy and its testing method. The quality control phantom is a cube, with at least one edge of the cube truncated. A rectangular inclined plane is located at the truncated edge, with one short side and the other short side of the rectangular inclined plane located on opposite sides of the phantom. The distance from the rectangular inclined plane to the origin of the phantom is equal to the distance from the origin of the phantom to the surface of the phantom sharing the long side of the rectangular inclined plane. This invention allows for the acquisition of dosimetric data of the beam measured at 0°, 90°, and preset angles using only a single placement, eliminating the need for multiple repositioning attempts by testing personnel in the testing room. This reduces the number of times personnel are exposed to induced radiation, lowering the risk of exposure.

Description

Technical Field

[0001] This invention relates to the field of equipment calibration technology, and in particular to a quality control phantom for heavy ion therapy and its testing method. Background Technology

[0002] Heavy ion therapy is an advanced technology that uses heavy ion beams (such as carbon ions and helium ions) for tumor radiotherapy. To ensure the accuracy of heavy ion therapy, quality control testing is essential. This quality control testing systematically examines equipment performance, dose distribution, and treatment procedures to control errors.

[0003] In quality control testing for heavy ion therapy, a detection phantom is required. Existing detection phantoms are generally solid water phantoms, composed of multiple stacked phantoms. When testing different treatment heads, the phantoms need to be stacked in different ways so that their surfaces are perpendicular to the incident heavy ion beam. The entire process includes: first, stacking the solid water phantoms in different ways; then scanning the solid water phantom using a specific scanning protocol and equipment such as a CT scanner; transmitting the scan data to the treatment planning system; creating a radiotherapy plan; and calculating the theoretical (or calculated) values ​​for the test points. Then, the solid water phantom is stacked in the manner corresponding to a specific treatment head, the treatment plan is implemented, and dosimetric data is measured in an ionization chamber. This data is then compared with the calculated values ​​to verify the performance of the heavy ion system.

[0004] When performing dosimetric verification on different treatment heads, testers need to enter the quality control testing room multiple times to change the stacking method of the solid water phantoms. However, heavy ion therapy produces harmful induced radiation. Testers are exposed to induced radiation when near the solid water phantoms. Although existing operating procedures have established strict experimental standards for this, safety risks still exist due to the manual nature of the operation. For personnel who are dedicated to quality control testing in heavy ion therapy, minimizing their exposure to induced radiation is of paramount importance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a quality control phantom for heavy ion therapy and its testing method, so as to minimize the exposure of quality control personnel to induced radiation and reduce the risk of exposure.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A quality control phantom for heavy ion therapy, the quality control phantom being a cube, wherein at least one edge of the cube is truncated;

[0008] The quality control phantom has a rectangular inclined surface at the location where the edges are cut off, and one short side and the other short side of the rectangular inclined surface are located on two opposite sides of the quality control phantom.

[0009] The inclination of the rectangular inclined surface is a preset angle, and the distance from the rectangular inclined surface to the origin of the quality control mold is equal to the distance from the surface of the quality control mold with the long side of the rectangular inclined surface as the common side to the origin of the mold.

[0010] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows:

[0011] A testing method for a quality control phantom used in heavy ion therapy, implemented using the aforementioned quality control phantom for heavy ion therapy, the method comprising:

[0012] S1. Using the side of the quality control mold that is adjacent to the long side of the rectangular inclined surface as the top surface, place the quality control mold in a preset position in the testing room.

[0013] S2. Control the heavy ion device to emit heavy ion beams from the top surface facing the quality control phantom, the side adjacent to the other long side of the rectangular inclined surface, and the rectangular inclined surface, and measure the dosimetric data using the ionization chamber.

[0014] The beneficial effects of this invention are as follows: It provides a quality control phantom for heavy ion therapy and its testing method. The quality control phantom is set with a rectangular inclined surface with a preset angle. The distances from the rectangular inclined surface and other sides of the quality control phantom to the origin of the phantom are equal. Therefore, during the quality control test of heavy ion therapy, only one placement is needed to obtain the dosimetric data of the beam measured at 0°, 90° and preset angles. This eliminates the need for testers to repeatedly enter the test room to rearrange the quality control phantom during the test process, reducing the number of times the quality control testers are exposed to induced radiation and lowering the exposure risk. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of a quality control phantom for heavy ion therapy according to the present invention during quality control scanning.

[0016] Figure 2 This is a three-dimensional view of a quality control phantom for heavy ion therapy according to the present invention during the acquisition of reference images;

[0017] Figure 3 This is a schematic diagram of a quality control phantom for heavy ion therapy of the present invention being irradiated by a 0° beam during quality control testing.

[0018] Figure 4This is a schematic diagram of a quality control phantom for heavy ion therapy of the present invention being irradiated by a 45° beam during quality control testing.

[0019] Figure 5 This is a schematic diagram of a quality control phantom for heavy ion therapy of the present invention being irradiated by a 90° beam during quality control testing.

[0020] Figure 6 This is a schematic diagram of the structure of a quality control phantom for heavy ion therapy according to the present invention, which has multiple contoured insertion holes;

[0021] Figure 7 A schematic diagram showing the relative positions of a quality control phantom and a phantom block for heavy ion therapy according to the present invention;

[0022] Figure 8 This is a schematic diagram illustrating the steps of a testing method for a quality control phantom used in heavy ion therapy according to the present invention.

[0023] Label Explanation:

[0024] 1. Quality control mold; 2. Rectangular bevel; 3. Contour insertion hole; 4. Solid push rod; 5. Cross-shaped scale; 6. Identifier; 7. Mold block. Detailed Implementation

[0025] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0026] Please refer to Figures 1 to 7 A quality control phantom for heavy ion therapy, wherein the quality control phantom 1 is a cube, and at least one edge of the cube is truncated;

[0027] The quality control mold 1 has a rectangular inclined surface 2 at the position where the edges are cut off. One short side and the other short side of the rectangular inclined surface 2 are located on two opposite sides of the quality control mold 1, respectively.

[0028] The inclination of the rectangular inclined surface 2 is a preset angle, and the distance from the rectangular inclined surface 2 to the origin of the quality control mold 1 is equal to the distance from the surface of the quality control mold 1 with the long side of the rectangular inclined surface 2 as the common side to the origin of the mold.

[0029] As can be seen from the above description, the beneficial effects of the present invention are as follows: A quality control phantom 1 with a rectangular inclined surface 2 at a preset angle is provided, and the distances from the rectangular inclined surface 2 and other sides of the quality control phantom 1 (excluding the rectangular inclined surface 2) to the origin of the phantom 1 are equal. Therefore, during quality control testing of heavy ion therapy, only one placement is needed to obtain dosimetric data of the beam measured at 0°, 90°, and the preset angle. This eliminates the need for testing personnel to repeatedly enter the testing room to rearrange the quality control phantom 1 during the testing process, reducing the number of times quality control testing personnel are exposed to induced radiation and lowering the risk of exposure.

[0030] Furthermore, the quality control mold 1 has contoured insertion holes 3 on its other sides, except for the rectangular inclined surface 2, at positions corresponding to the origin of the mold;

[0031] The depth of the contouring insertion hole 3 is such that when the balance cap is fully inserted into the contouring insertion hole 3, the center of the scale ring on the balance cap coincides exactly with the origin of the mold body.

[0032] As described above, a contoured insertion hole 3 is provided at the phantom origin position of the quality control phantom 1 to accommodate the balancing cap, ensuring that the center of the scale ring on the balancing cap strictly coincides with the phantom origin. In heavy ion therapy quality control testing, the coincidence of the center of the scale ring on the balancing cap with the phantom origin ensures the stability of the physical environment of the dose calculation reference point, improves the accuracy of dose measurement and beam calibration, and makes the quality control data more closely reflect the dose distribution scenario during actual clinical treatment.

[0033] Furthermore, it also includes a solid putter 4;

[0034] The solid push rod 4 is adapted to the contoured insertion hole 3.

[0035] As can be seen from the above description, the solid push rod 4 is adapted to the contoured insertion hole 3. After the solid push rod 4 is fully inserted, the entire quality control mold 1 no longer has an internal cavity and can be regarded as a complete solid structure.

[0036] Furthermore, both the quality control mold 1 and the solid push rod 4 are made of polymethyl methacrylate.

[0037] As described above, the quality control phantom 1 and the solid pusher 4 are made of polymethyl methacrylate (PMMA, commonly known as plexiglass). This material has good water equivalence, and its physical parameters such as density and effective atomic number are close to those of water. Using PMMA to fabricate the quality control phantom 1 and the solid pusher 4 can more realistically simulate the transport and energy deposition processes of heavy ions in water, making the dose measurement and beam characteristic verification results of quality control tests more reliable, and providing a high-quality simulation basis for the accuracy of clinical treatment plans.

[0038] Furthermore, the quality control mold 1 has cross-shaped scales 5 on its other sides, except for the rectangular inclined surface 2, and the origin of the cross-shaped scales 5 corresponds to the projection of the origin of the mold onto the side.

[0039] As described above, the quality control phantom 1 has a cross-shaped scale 5 on its side, with the intersection point corresponding to the phantom's origin. During heavy ion therapy quality control testing, the scale allows for quick and intuitive alignment of the phantom with the external laser (the coordinate system of the beam system is expressed through the external laser), improving the efficiency and accuracy of the quality control test.

[0040] Furthermore, an identifier 6 for image software recognition is provided at the intersection point of the cross-shaped scale 5.

[0041] As described above, the origin point of the cross-shaped scale 5 is marked with an image software-recognizable marker 6. In the quality control of heavy ion therapy, in conjunction with image-guided technology (such as digital radiography (DR)), the image software can quickly and automatically identify the phantom's origin position. This achieves automated and digital calibration of phantom positioning, reducing manual positioning errors, and significantly improving positioning consistency, especially in repeated tests or multiple batches of phantom tests.

[0042] Furthermore, the marker 6 is located on another side of the quality control mold 1 opposite to the side where the contoured insertion hole 3 is located.

[0043] As can be seen from the above description, on the one hand, the centroid can be quickly identified from one direction using image software through the marker 6, and on the other hand, the balance cap can be physically positioned from another direction with the help of the contouring socket 3.

[0044] Furthermore, the preset angle is 45°.

[0045] As described above, the preset angle is set to 45°. In the quality control of heavy ion therapy, this angle is a typical representative of the oblique incidence angle commonly seen in clinical practice (for some tumors, the beam needs to be incident at an oblique angle to avoid irradiation that could endanger the organs). Using a phantom with a 45° angled surface, the dose characteristics of beams in multiple directions, such as 0° (vertical incidence), 90° (horizontal incidence), and 45° (oblique incidence), can be verified simultaneously in a single setup, covering commonly used beam angle scenarios in clinical practice.

[0046] Please refer to Figure 8 A testing method for a quality control phantom for heavy ion therapy, implemented using the aforementioned quality control phantom for heavy ion therapy, the method comprising:

[0047] S1. Using the side of the quality control mold 1 that is adjacent to the long side of the rectangular inclined surface 2 as the top surface, place the quality control mold 1 in a preset position in the testing room.

[0048] S2. Control the heavy ion device to emit heavy ion beams from the top surface facing the quality control phantom 1, the side adjacent to the other long side of the rectangular inclined surface, and the rectangular inclined surface, and measure the dosimetric data using the ionization chamber.

[0049] As can be seen from the above description, the beneficial effects of the present invention are as follows: A quality control phantom 1 with a rectangular inclined surface 2 at a preset angle is provided, and the distances from the rectangular inclined surface 2 and other sides of the quality control phantom 1 (excluding the rectangular inclined surface 2) to the origin of the phantom 1 are equal. Therefore, during quality control testing of heavy ion therapy, only one placement is needed to obtain dosimetric data of the beam measured at 0°, 90°, and the preset angle. This eliminates the need for testing personnel to repeatedly enter the testing room to rearrange the quality control phantom 1 during the testing process, reducing the number of times quality control testing personnel are exposed to induced radiation and lowering the risk of exposure.

[0050] Furthermore, the process before S2 includes:

[0051] Using the cross-shaped scale 5 and the marker 6 on the quality control phantom 1, the position of the quality control phantom 1 is calibrated by a laser positioning device, and a reference image of the quality control phantom 1 is acquired at the same time.

[0052] As described above, before testing, the phantom's position was calibrated using a laser positioning device, along with the cross-shaped scale 5 and the marker 6, and reference images were acquired. Laser positioning can quickly establish a precise correlation between the phantom and the coordinate system of the treatment room. The marker 6 and the scale-assisted image software accurately identify the phantom's origin, and the reference image serves as a benchmark for comparing the phantom's position in subsequent tests.

[0053] Please refer to Figures 1 to 7 Embodiment 1 of the present invention is as follows:

[0054] A quality control phantom for heavy ion therapy includes a cube-shaped phantom 1 with at least one edge removed. A rectangular inclined plane 2 is located at the removed edge position on the phantom 1. One short side and the other short side of the rectangular inclined plane 2 are located on opposite sides of the phantom 1. The inclination angle of the rectangular inclined plane 2 is a preset angle. The distance from the rectangular inclined plane 2 to the origin of the phantom 1 is equal to the distance from the surface of the phantom 1 sharing the long side of the rectangular inclined plane 2 to the origin. Furthermore, contoured insertion holes 3 are provided on the other sides of the phantom 1, corresponding to the origin. The inner bottom of the contoured insertion holes 3 overlaps with the origin and is used to hold a balancing cap.

[0055] In this embodiment, as Figure 1As shown, the quality control phantom 1 is obtained by removing one edge from a 150×150×150 mm cube, thus forming a rectangular inclined surface 2; for reference. Figure 2 and Figure 3 The inclination angle of the rectangular inclined surface 2 is a preset angle. The distance D3 from the rectangular inclined surface 2 to the origin of the quality control phantom 1 is equal to the distance (D1 and D2) from the surface of the quality control phantom 1 with the long side of the rectangular inclined surface 2 as the common side to the origin of the phantom. That is, the top surface of the quality control phantom 1, the surface adjacent to the other long side of the rectangular inclined surface, and the distance from the rectangular inclined surface 2 to the origin of the phantom are equal, specifically 100 mm. In order to adapt to heavy ion treatment heads of various angles, the inclination angle of the rectangular inclined surface 2 can be designed to be other angles such as 30° in addition to 45°.

[0056] In this embodiment, as Figure 6 As shown, the number of contoured sockets 3 can be two or more; and only one contoured socket 3 satisfies the above conditions that distances D1, D2 and D3 are equal, while other contoured sockets 3 can still be used for quality control testing even if they do not meet these conditions.

[0057] Combination Figure 7 As shown, this embodiment also provides one or more phantom blocks 7; the shape of the phantom block 7 is similar to the surface formed by the rectangular inclined surface 2 of the quality control phantom 1 and the surface with the long side of the rectangular inclined surface 2 as the common side; in use, the phantom block 7 also corresponds to the rectangular inclined surface 2 and the surface with the long side of the rectangular inclined surface 2 as the common side, and is used to increase the distance from the ionization chamber to the phantom surface of the quality control phantom 1 during heavy ion therapy testing, thereby measuring dosimetric data at different depths.

[0058] Additionally, the quality control phantom 1 also includes a solid push rod 4. Both the quality control phantom 1 and the solid push rod 4 are made of polymethyl methacrylate; alternatively, they can also be made of materials with radioactive properties similar to water, such as polystyrene.

[0059] In this embodiment, as Figure 2 As shown, the quality control phantom 1, excluding the rectangular inclined surface 2, has cross-shaped scales 5 on its other sides. The origin of the intersection of the cross-shaped scales 5 corresponds to the projection of the phantom's origin onto the side surface. A marker 6 for image software recognition is located at the origin of the cross-shaped scales 5. The marker 6 is located on another side of the quality control phantom 1 opposite to the side containing the contour-following insertion hole 3. The marker 6 can be made of tungsten beads (preferably with a diameter of 1–1.5 mm), or other materials with high atomic numbers can be used to achieve high image contrast.

[0060] Please refer to Figures 1 to 8 Embodiment two of the present invention is as follows:

[0061] A testing method for a quality control phantom used in heavy ion therapy, such as Figure 8 As shown, an application of a quality control phantom for heavy ion therapy in Example 1 is implemented, the method including:

[0062] S1. Using the side of the quality control mold 1 that is adjacent to the long side of the rectangular inclined surface 2 as the top surface, place the quality control mold 1 in the preset position in the test room.

[0063] In this embodiment, the longer side of the rectangular inclined plane 2 refers to the top and bottom sides of the inclined plane 2. Combined with... Figure 2 As shown, using the cross-shaped scale 5 and the marker 6 on the quality control phantom 1, the position of the quality control phantom 1 is calibrated by a laser positioning device, while simultaneously acquiring a reference image of the quality control phantom 1. Specifically, this includes:

[0064] After the quality control phantom 1 is positioned and before the imaging process begins, the marker 6 is installed on the crosshair scale 5. Alignment is then performed using the laser positioning device and the crosshair scale 5. After phantom alignment, two sets of digital images are acquired. The marker 6 is identified in both sets of digital images using the established reference image generation software to determine the center point, and then a new reference image is acquired. The newly generated reference image is stored in the designated system folder.

[0065] It should be noted that the acquisition of the reference image is intended for radiographic quality control using the quality control phantom 1 of this embodiment. After positioning the quality control phantom 1 according to the laser lamp, images from the DR are acquired to determine whether there is a deviation between the laser lamp and the DR. Therefore, the quality control phantom 1 of this embodiment is actually a multifunctional phantom, which can be used to determine whether there is a deviation between the laser lamp and the DR, and can also be used for acquiring dosimetric data as mentioned below. However, the marker 6 only functions when determining whether there is a deviation between the laser lamp and the DR, and is irrelevant when acquiring dosimetric data.

[0066] S2. Insert the ionization chamber with the balancing cap into the conformal socket, and control the heavy ion device to emit heavy ion beams from the top surface facing the quality control phantom 1, the side adjacent to the other long side of the rectangular inclined surface, and the rectangular inclined surface of the quality control phantom 1, and use the ionization chamber to measure the dosimetric data.

[0067] In this embodiment, combined with Figure 1 and 3 to Figure 5 As shown, the top surface of the quality control phantom 1, the side adjacent to the other long side of the rectangular inclined surface, and the rectangular inclined surface 2 correspond to the following angles:

[0068] 0 degrees: This represents the case where the beam is incident perpendicularly along a straight line. This is the most basic beam direction. In many treatment plans, the beam will be incident in a similar direction. Testing this angle can verify the basic performance of the equipment, such as dose output and beam stability, under conventional straight irradiation.

[0069] 45 degrees: This is an oblique incidence angle, which can be used to examine the equipment's ability to control beam transmission, scanning, and dose distribution in non-horizontal and non-vertical directions, and to verify whether the beam can accurately reach the predetermined position and maintain the accuracy of the dose during oblique transmission.

[0070] 90 degrees: This refers to horizontal incidence. For some areas that require treatment from a specific horizontal direction (such as the treatment of certain tumors in the head and neck), testing at this angle can evaluate the device's performance in the horizontal direction, such as positioning accuracy and dose conformity.

[0071] In this embodiment, the quality control phantom 1 is scanned using a Siemens CT scanner with a chest scanning protocol (tube voltage 120 kV, tube current 180 mA, slice thickness 1 mm) (the phantom is pulled out of the solid push rod and the balance cap of the ionization chamber is inserted, but the ionization chamber is not inserted), and the scan data is transmitted to the treatment planning system.

[0072] Furthermore, in the treatment planning system, each test case creates three uniformly sized but different depth rectangular planning target volumes (PTVs): shallow PTV, intermediate PTV, and deep PTV, thereby covering all energy levels.

[0073] The region of interest (ROI) is defined as the space occupied by the sensitive volume of the ionization chamber when the Farmer ionization chamber with its balancing cap fully inserted into the phantom. In the planning system, the ROI is treated with water (the ROI is originally air, which is easily distinguishable in CT images). A radiotherapy plan is then created, and the average dose of the ROI is recorded (denoted as ). )

[0074] During quality control testing, the ionization chamber with the balancing cap is inserted into the conformal socket. Quality control phantom 1 is aligned using a positioning laser, ensuring that the center of the positioning ring on the balancing cap, the phantom origin, and the origin of the treatment chamber coordinate system coincide. The absorbed dose of the phantom's DOI volume is then measured. It can be calculated using the formula:

[0075] ;

[0076] in, M Q This is the electrometer reading after temperature and pressure correction. N D,wFor water absorption dose calibration coefficient, k Q The beam quality factor is 1.028 for the PTW30013 Farmer ionization chamber, according to the TRS-398 report.

[0077] Daily morning test volume D w,Q Calculate the average value of the morning check data for five consecutive days, and denot it as . .

[0078] Will (The average of the five measurements above) and By comparing the calculated values, the accuracy of the planning system's calculations can be assessed; the daily D values ​​can then be used to evaluate the accuracy of the system's calculations. w,Q and By comparing the average values ​​of the five measurements above, the daily stability of the heavy ion metering system's output dose can be assessed.

[0079] In summary, this invention provides a quality control phantom for heavy ion therapy and its testing method. The quality control phantom is designed with a rectangular inclined surface at a preset angle. The distances from the rectangular inclined surface and all other sides of the phantom to its origin are equal. Therefore, during quality control testing for heavy ion therapy, only one placement is needed to obtain dosimetric data for the measured beam at 0°, 90°, and the preset angle. This eliminates the need for testing personnel to repeatedly enter the testing room to rearrange the phantom, reducing the number of times they are exposed to induced radiation and lowering the risk of exposure. Furthermore, the phantom has a cross-shaped scale on its side, with the intersection point corresponding to the phantom's origin. In addition, this phantom can also be used to determine whether there is a deviation between the laser lamp and the DR (radiofrequency ablation).

[0080] In addition, the phantom is relatively small, and even if there are still residual induced rays, it can be moved away after being wrapped in lead apron. In contrast, solid water is often larger and difficult to move away after being completely wrapped in ordinary lead apron.

[0081] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A testing method for a quality control phantom used in heavy ion therapy, characterized in that, This is achieved using a quality control phantom for heavy ion therapy, wherein the quality control phantom is a cube, and at least one edge of the cube is truncated. The quality control phantom has a rectangular inclined surface at the location where the edges are cut off, and one short side and the other short side of the rectangular inclined surface are located on two opposite sides of the quality control phantom. The inclination of the rectangular inclined surface is a preset angle. The distance from the rectangular inclined surface to the origin of the quality control mold is equal to the distance from the surface of the quality control mold with the long side of the rectangular inclined surface as the common side to the origin of the mold. The quality control mold has contoured insertion holes on the other sides of the mold corresponding to the origin of the mold. The depth of the contouring insertion hole is such that when the balance cap is fully inserted into the contouring insertion hole, the center of the scale ring on the balance cap coincides exactly with the origin of the mold body. The quality control mold has cross-shaped scales on its other sides, except for the rectangular inclined surface. The origin of the cross-shaped scales corresponds to the projection of the mold origin onto the side surface. The method includes the following steps: S1. Using the side of the quality control mold that is adjacent to one of the long sides of the rectangular inclined plane as the top surface, place the quality control mold in a preset position in the testing room. S2. Control the heavy ion device to emit heavy ion beams from the top surface facing the quality control phantom, the side adjacent to the other long side of the rectangular inclined surface, and the rectangular inclined surface, and measure the dosimetric data using the ionization chamber; When conducting quality control tests for heavy ion therapy, only one placement is needed to obtain dosimetric data of the beam measured at 0°, 90°, and preset angles.

2. The testing method for a quality control phantom for heavy ion therapy according to claim 1, characterized in that, Before S1, the following also applies: Using the cross-shaped scale and markers on the quality control phantom, the phantom is positioned and calibrated by a laser positioning device, while a reference image of the phantom is acquired.

3. The testing method for a quality control phantom for heavy ion therapy according to claim 1, characterized in that, It also includes solid putters; The solid push rod is adapted to the contoured insertion hole.

4. The testing method for a quality control phantom for heavy ion therapy according to claim 3, characterized in that, Both the quality control phantom and the solid push rod are made of polymethyl methacrylate.

5. The testing method for a quality control phantom for heavy ion therapy according to claim 1, characterized in that, The origin of the cross-shaped scale is marked with an identifier for image software recognition.

6. A testing method for a quality control phantom for heavy ion therapy according to claim 5, characterized in that, The identification element is located on the other side of the quality control mold opposite to the side where the contoured insertion hole is located.

7. The testing method for a quality control phantom for heavy ion therapy according to claim 1, characterized in that, The preset angle is 45°.

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