Dynamic motif dose verification insertion rod and equipment

Abstract

The utility model relates to a dynamic mold body dose verification insertion rod and equipment, the dynamic mold body dose verification insertion rod comprises an insertion rod main body and a fixing part, the insertion rod main body is provided with a mounting part, the fixing part is arranged on the mounting part, and the fixing part comprises a first mold body, a second mold body and a third mold body which are stacked; a spherical simulated tumor target body is arranged between the first die body and the second die body, an imaging film is arranged between the second die body and the third die body, and the stacking direction of the first die body, the second die body and the third die body is parallel to the concave direction of the mounting part. According to the invention, the fixing part is formed by stacking and splicing the first mold body, the second mold body and the third mold body, the imaging film is arranged between the second mold body and the third mold body, and the fixing part is arranged in the mounting part of the insertion rod main body, so that when dynamic mold body dose verification is carried out, the mounting is reliable, and point dose verification and dose distribution verification can be carried out at the same time; and the dose verification time is saved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular to a dynamic phantom dose verification rod and equipment. Background Art

[0002] Radiotherapy dose verification is an important component of radiotherapy quality assurance. Dynamic dose verification phantoms are used for dosimetry research of radiotherapy, verification and measurement of the dose accuracy of radiotherapy plans, so as to ensure the accurate implementation of radiotherapy.

[0003] At present, the dose verification method is to first import the designed plan into the phantom for calculation to obtain the theoretical dose and dose distribution, then use the phantom to replace the real human body, execute the plan on the radiotherapy equipment, and finally compare the actual dose with the dose calculated by the computer. Utility Model Content

[0004] In order to solve the problems existing in the related art, according to a first aspect of the present disclosure, a dynamic phantom dose verification plug is provided for dynamic phantom dose verification, and the dynamic phantom dose verification plug comprises:

[0005] The plug rod body has a mounting portion, wherein the mounting portion is formed by a surface of the plug rod body being recessed radially inward;

[0006] A fixing part, arranged on the mounting part, the fixing part comprises a first phantom, a second phantom and a third phantom which are stacked, a spherical simulated tumor target is arranged between the first phantom and the second phantom, and an imaging film is arranged between the second phantom and the third phantom;

[0007] Wherein, when the fixing portion and the insert rod body are in an assembled state, the stacking direction of the first mold body, the second mold body and the third mold body is parallel to the recessed direction of the mounting portion.

[0008] In some embodiments, a baffle is provided on the bottom surface of the mounting portion, the baffle is an integral structure with the plug body, and the baffle and the plug body enclose the mounting portion in a groove shape;

[0009] When the fixing portion and the insert rod body are assembled, the third mold body is connected to the baffle.

[0010] In some embodiments, a through hole is provided on the baffle, the through hole passes through the baffle along the recessed direction of the mounting portion, and the through hole is communicated with the mounting portion.

[0011] In some embodiments, along the radial direction of the plunger body, the mounting portion penetrates the plunger body.

[0012] In some embodiments, the side wall of the mounting portion has a limiting groove formed by being recessed toward the insertion rod body, and along the through direction of the mounting portion, the limiting groove is smaller than the size of the mounting portion, and the side wall of the fixing portion is provided with a limiting protrusion;

[0013] When the fixing portion is assembled with the insert rod body, the limiting protrusion extends into the limiting groove.

[0014] In some embodiments, one side of the plunger body has a mounting hole for placing the ionization chamber, and the mounting hole extends along the axial direction of the plunger body.

[0015] In some embodiments, one end of the mounting hole extends into the first mold body.

[0016] In some embodiments, the opposing surfaces of the second mold body and the third mold body are planes.

[0017] According to a second aspect of the present disclosure, the present disclosure provides a dynamic phantom dose verification device, comprising a radiation section and a chest and abdomen phantom, and the dynamic phantom dose verification rod described in the first aspect;

[0018] In the test state, the dynamic phantom dose verification rod is inserted into the chest and abdomen phantom.

[0019] In some embodiments, the radiation portion is located above the chest and abdomen phantom, and the radiation direction of the radiation portion is perpendicular to the imaging film.

[0020] The beneficial effects of the present disclosure are as follows: the fixed part is formed by stacking and splicing the first phantom, the second phantom and the third phantom, an imaging film is arranged between the second phantom and the third phantom, and the fixed part is arranged in the mounting part of the insertion rod body. When performing dynamic phantom dose verification, the installation is reliable, and point dose verification and dose distribution verification can be performed simultaneously, saving the dose verification time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 is a schematic diagram of a dynamic phantom dose verification rod provided by an embodiment of the present disclosure;

[0023] Figure 2 is a structural schematic diagram of a dynamic phantom dose verification rod provided by an embodiment of the present disclosure;

[0024] Figure 3 yes Figure 2 A magnified image of area A;

[0025] Figure 4 is a schematic diagram of another example of a dynamic phantom dose verification rod provided by an embodiment of the present disclosure;

[0026] Figure 5 is a structural diagram of a dynamic phantom dose verification rod provided by another example of an embodiment of the present disclosure;

[0027] Figure 6 It is a schematic diagram of a dose verification rod device provided in an embodiment of the present disclosure.

[0028] Description of the drawings: 1. Dynamic phantom dose verification rod; 2. Rod body; 22. Mounting hole; 23. Limiting groove; 21. Mounting part; 3. Fixing part; 31. First phantom; 32. Second phantom; 33. Third phantom; 34. Limiting protrusion; 4. Baffle; 41. Through hole; 5. Simulated tumor target; 6. Imaging film; 7. Radiation part; 8. Chest and abdomen phantom; 9. Ionization chamber; 10. Motion platform. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that, in the absence of conflict, the embodiments in this disclosure and the feature vectors in the embodiments can be arbitrarily combined with each other.

[0030] In the related technology, radiotherapy is emphasized to treat the patient's tumor through radiation. Usually, the treatment plan needs to be dose verified before execution to ensure the safe implementation of the patient's treatment plan. However, the existing dynamic phantom rod insertion radiotherapy dose verification only uses E2E film, and can only be used to test the lung tracking mode of CyberKnife. It is also only suitable for the target accuracy test of CyberKnife and cannot perform other quality control. In addition, the existing radiotherapy dose verification has complex radiation fields and planned target area data errors, which cause dose deviations and cause the actual dose to be inconsistent with the planned dose.

[0031] In order to solve the problems existing in the related art, the embodiment of the present disclosure provides a dynamic phantom dose verification plug and a device, the dynamic phantom dose verification plug is used for dynamic phantom dose verification, the dynamic phantom dose verification plug includes a plug body and a fixing part, the plug body has a mounting part, the mounting part is formed by the surface of the plug body being recessed toward the radial inner side, the fixing part is arranged at the mounting part, the fixing part includes a first phantom, a second phantom and a third phantom which are stacked and arranged, a spherical simulated tumor target is arranged between the first phantom and the second phantom, and an imaging film is arranged between the second phantom and the third phantom, wherein when the fixing part and the plug body are in an assembled state, the stacking direction of the first phantom, the second phantom and the third phantom is parallel to the recessed direction of the mounting part. In the present disclosure, the fixing part is formed by stacking and splicing the first phantom, the second phantom and the third phantom, an imaging film is arranged between the second phantom and the third phantom, and the fixing part is arranged in the mounting part of the plug body. When performing dynamic phantom dose verification, the installation is reliable, and point dose verification and dose distribution verification can be performed simultaneously, saving the dose verification time.

[0032] In order to make the purpose, technical solution and beneficial effects of the embodiments of the present disclosure more clear, a dynamic phantom dose verification plug and device provided by the embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. Figures 1 to 6 As shown, a dynamic phantom dose verification rod is shown, which is used for dynamic phantom dose verification. In clinical practice, radiotherapy is emphasized as a highly accurate treatment technology and is often used for cancer patients. Before treatment, the actual patient situation is simulated by using a patient breathing movement phantom. To ensure that the patient receives the irradiation dose and dose distribution designed in the plan, patient dose verification must be performed. Dose verification equipment is usually used to import the designed plan into the phantom of the dose verification equipment for calculation to obtain the theoretical dose and dose distribution. After that, the phantom is used instead of the real human body, and the plan is executed on the radiotherapy equipment. Finally, the actual dose is compared with the dose calculated by the computer. If the dose is within the executable range, the patient will be given radiotherapy.

[0033] like Figure 1 and Figure 2As shown, the dynamic phantom dose verification plunger 1 includes a plunger body 2 and a fixing portion 3. The plunger body 2 has a mounting portion 21. The mounting portion 21 is formed by a surface of the plunger body 2 being recessed radially inward, and the fixing portion 3 is disposed on the mounting portion 21. The shapes and sizes of the plunger body 2 and the fixing portion 3 can be adaptively set as required. In one example, the rod body 2 is a cylindrical structure, and the axial length of the rod body 2 is 31 cm and the diameter is 6.4 cm. The top of the fixing part 3 is an arc-shaped structure to be flush with the outer peripheral surface of the dynamic model dose verification rod 1, and the length, width and height of the fixing part 3 are all 4 cm. The fixing part 3 includes a first model 31, a second model 32 and a third model 33 which are stacked. The fixing part 3 is formed by splicing the first model 31, the second model 32 and the third model 33. A spherical simulated tumor target 5 is arranged between the first model 31 and the second model 32. The diameter of the spherical simulated tumor target 5 can be 1.5 cm and is made of a high-density polytetrafluoroethylene material. The spherical simulated tumor target 5 can be used as a tumor marker to simulate the patient's tumor target area during the verification process.

[0034] An imaging film 6 is arranged between the second phantom 32 and the third phantom 33. The imaging film 6 has the advantages of being able to obtain two-dimensional dose distribution at one time and being convenient for long-term storage and analysis. The imaging film 6 is scanned into a computer with a specific scanner at a certain interval after radiation irradiation, and the corresponding isodose distribution is obtained after processing in the software, which is analyzed with the actual dose distribution to evaluate the verification result. The imaging film 6 can be a wash-free film such as EDR2 film and EBT film. In the present disclosure, the imaging film 6 adopts EBT3 film. EBT3 film has strong sensitivity, long storage time, and good measurement response to the dose of initial rays and scattered rays.

[0035] It should be noted that the projection pattern of the fixing portion 3 on the imaging film 6 is the same as the size of the image 6 on the imaging film.

[0036] Among them, continue to refer to Figure 1 and Figure 2 , when the fixing part 3 and the plunger body 2 are in an assembled state, that is, the first mold body 31, the second mold body 32 and the third mold body 33 of the fixing part 3 are all located in the mounting part 21 of the plunger body 2, and the stacking direction of the first mold body 31, the second mold body 32 and the third mold body 33 of the fixing part 3 (such as Figure 2 The z direction shown in FIG. 2 ) and the recessed direction of the mounting portion 21 (as shown in FIG. Figure 2 parallel to the z direction shown in ).

[0037] It should be noted that the dynamic phantom dose verification rod 1 and the fixing part 3 are both made of materials equivalent to the human body and are used to simulate human tissue. The use of equivalent materials can reduce measurement errors.

[0038] In the present disclosure, the fixed part is formed by stacking and splicing a first phantom, a second phantom and a third phantom, an imaging film is arranged between the second phantom and the third phantom, and the fixed part is arranged in the mounting part of the insertion rod body. When performing dynamic phantom dose verification, the installation is reliable, and point dose verification and dose distribution verification can be performed simultaneously, saving dose verification time.

[0039] In some embodiments, Figure 2 and Figure 3 As shown, a baffle 4 is provided on the bottom surface of the mounting portion 21, and the baffle 4 is connected to the plug rod body 2. The baffle 4 and the plug rod body 2 enclose a groove-shaped mounting portion 21. When the fixing portion 3 and the plug rod body 2 are assembled, the fixing portion 3 is placed in the mounting portion 21, and the third mold body 33 of the fixing portion 3 is connected to the baffle 4. The baffle is used to provide positioning and support for the fixing portion. The shape of the baffle 4 can be a square structure or a circular structure, and can be adaptively set as required. In one example, the baffle 4 and the plug rod body 2 are an integral structure. For example, when the mounting portion 21 is recessed in the radial direction of the plug rod body 2 to form a groove-shaped mounting portion, the structure retained in the plug rod body 2 that is opposite to the groove forms the baffle 4. In another example, the baffle 4 is detachably connected to the plug rod body 2, and the baffle 4 is placed in the mounting portion 21, so that the edge of the baffle 4 is coated with a glue layer and connected to the plug rod body 2.

[0040] In some embodiments, Figures 1 to 3 As shown, the baffle plate 4 is provided with a through hole 41, and the through hole 41 is along the recessed direction of the mounting portion 21 (such as Figure 2 The through hole 41 is connected to the mounting portion 21. After the dynamic phantom dose verification, the operator can use the auxiliary ejection structure to remove the fixing portion 3 from the mounting portion 21. For example, the rod-shaped auxiliary structure passes through the through hole 41 to abut against the bottom surface of the third mold body 33 of the fixing portion 3. The fixing portion 3 can be ejected from the mounting portion 21 by applying an external force along the extension direction of the rod-shaped auxiliary structure. In this embodiment, the through hole 41 is provided to facilitate the removal of the fixing portion 3 from the mounting portion 21 of the rod body 2, and the subsequent measurement and analysis of the imaging film 6 can be effectively performed.

[0041] In one example, if Figure 4 As shown, along the radial direction of the plunger body 2 (such as Figure 4 The mounting portion 21 passes through the insertion rod body 2, that is, both sides of the mounting portion 21 have openings, and the fixing portion 3 is located in the mounting portion 21 of the insertion rod body 2. The through mounting portion 21 is provided to facilitate the fixing portion 3 to be installed and removed from the openings on both sides of the mounting portion 21.

[0042] In another example, if Figure 5As shown, the side wall of the mounting portion 21 has a limiting groove 23 which is recessed toward the insertion rod body 2, that is, the limiting groove 23 is formed along the Figure 5 The concave shape is formed in the opposite direction of the z direction, and the through direction of the mounting portion 21 (such as Figure 5 The limiting groove 23 is smaller than the size of the mounting portion 21, and the side wall of the fixing portion 3 is provided with a limiting protrusion 34. When the fixing portion 3 is assembled with the plunger body 2, the limiting protrusion 34 of the fixing portion 3 is along the Figure 5 The fixing portion 3 extends into the limiting groove 23 in the opposite direction of the z direction shown in FIG. 1 . This arrangement enables the fixing portion 3 to be placed in the mounting portion 21 only in one direction, for example, Figure 5 As shown, the fixing portion 3 can only be placed downward in the mounting portion 21 in the opposite direction of the z direction, and the limiting groove 23 matches the limiting protrusion 34, which can support the fixing portion 3 so that the fixing portion 3 is placed in the mounting portion 21 to prevent it from falling. When disassembling, the fixing portion 3 can only be placed in the mounting portion 21 in the opposite direction of the z direction. Figure 5 The z direction shown in FIG. 2 is moved out from the mounting portion 21 .

[0043] It should be noted that the sizes of the limiting groove 23 and the mounting portion 21 can be adaptively set as needed, as long as the limiting groove 23 is smaller than the size of the mounting portion 21. This disclosure does not impose too many restrictions on this.

[0044] In some embodiments, continue to refer to Figures 1 to 5 The plug body 2 has a mounting hole 22 on one side for placing the ionization chamber 9. The mounting hole 22 is along the axial direction of the plug body 2 (eg Figure 2 The mounting hole 22 extends in the y direction as shown in FIG. 1 , and the mounting hole 22 is a cylindrical structure. The size of the mounting hole can be adaptively set as required. In one example, the axial length of the mounting hole 22 can be 13 cm, the diameter can be 7.02 cm, and the ionization chamber 9 can be placed therein for subsequent point dose verification.

[0045] In some embodiments, continue to refer to Figures 1 to 5 , one end of the mounting hole 22 extends into the first mold body 31. In one example, Figure 2 As shown, one end of the mounting hole 22 extends into the first phantom 31, that is, one end of the mounting hole 22 is close to the spherical simulated tumor target 5. When performing dynamic phantom dose verification, the ionization chamber 9 is placed in the mounting hole 22, and point dose verification can be performed to measure the radiation dose intensity around the simulated tumor target 5 in the fixing part 3, so as to compare and evaluate the actual dose, so as to maximize the protection of surrounding normal tissues or organs while subsequently irradiating the simulated tumor target 5 with high doses and accurately.

[0046] In some embodiments, an imaging film 6 is placed between the second phantom 32 and the third phantom 33 of the fixed portion 3, and the opposing surfaces of the second phantom 32 and the third phantom 33 are planes, so that during dynamic phantom dose verification, the second phantom 32 and the third phantom 33 can better clamp the imaging film 6 and quickly obtain the two-dimensional dose distribution of the radiation field, thereby avoiding light leakage and affecting the display condition of the imaging film 6.

[0047] According to an exemplary embodiment of the present disclosure, Figure 6 As shown, the present disclosure provides a dynamic phantom dose verification device, including a radiation part 7 and a chest and abdomen phantom 8, and the above-mentioned dynamic phantom dose verification plug 1, the dynamic phantom dose verification plug 1 is used to simulate human tissue, the dynamic phantom dose verification plug 1 can be a lung motion plug, or a liver motion plug, or a pancreas motion plug, etc. The dynamic phantom dose verification plug 1 of the present disclosure is a lung motion plug. In the present disclosure, since the CyberKnife is used for radiotherapy, the tumor displacement caused by the patient's breathing, coughing, organ movement, etc. is overcome, the correction position is automatically detected, and the tumor is tracked and locked in real time throughout the whole process. The tumor can be accurately locked by using the guided tracking function. In the measurement state, the dynamic phantom dose verification plug 1 is inserted into the chest and abdomen phantom 8, and one end of the dynamic phantom dose verification plug 1 is connected to the motion platform 10, so that the motion platform 10 drives the dynamic phantom dose verification plug 1 to translate or rotate, thereby forming a simulated human respiratory movement.

[0048] In some embodiments, Figure 1 and Figure 6 As shown, the radiation part 7 is located above the chest and abdomen model 8, and the radiation direction of the radiation part 7 is perpendicular to the imaging film 6, which is convenient for accurate dose irradiation of the imaging film 6 and avoids deformation of the imaging film 6.

[0049] The working principle of a dynamic phantom dose verification rod and device disclosed in the present invention is:

[0050] like Figures 1 to 6 As shown, a dynamic phantom dose verification plug and device are shown. First, the imaging film 6 (such as EBT3 film) is cut into a size suitable for the fixed part 3, and the direction of the imaging film 6 (such as EBT3 film) is marked. The marked imaging film 6 is placed between the second phantom 32 and the third phantom 33 of the fixed part 3, and then the fixed part containing the imaging film 6 is placed in the mounting part 21 of the plug body 2, thereby forming a dynamic phantom dose verification plug 1. It should be noted that a spherical simulated tumor target 5 is arranged between the first phantom 31 and the second phantom 32 of the fixed part 3 to simulate a tumor in the human body.

[0051] Next, the dynamic phantom dose verification plug 1 is placed in the chest and abdomen phantom 8, one end of the dynamic phantom dose verification plug 1 is connected to the motion platform 10, and an ionization chamber 9 is placed in the mounting hole 22 at the other end of the dynamic phantom dose verification plug 1. The phantom movement mode, frequency and amplitude are adjusted, and the dynamic phantom dose verification plug 1 is driven by the motion platform to perform dynamic phantom dose measurement. The imaging film 6 can be placed in the plug body and the ionization chamber can be placed in the mounting hole 22, so that point dose verification and dose distribution verification can be performed simultaneously during the measurement.

[0052] Finally, the actual dose is compared with the dose calculated by the computer, the planar dose distribution obtained by the imaging film 6 is analyzed and the measurement results are recorded, and subsequent work is carried out based on the results.

[0053] In the description of the present disclosure, it is necessary to understand that the orientations or positional relationships indicated by the terms "bottom", "upper", "lower", "vertical", "parallel", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0054] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features.

[0055] In the present disclosure, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A dynamic phantom dose verification plunger, characterized in that: Used for dynamic phantom dose verification, the dynamic phantom dose verification plug includes: The plug rod body has a mounting portion, wherein the mounting portion is formed by a surface of the plug rod body being recessed radially inward; A fixing part, arranged on the mounting part, the fixing part comprises a first phantom, a second phantom and a third phantom which are stacked, a spherical simulated tumor target is arranged between the first phantom and the second phantom, and an imaging film is arranged between the second phantom and the third phantom; Wherein, when the fixing portion and the insert rod body are in an assembled state, the stacking direction of the first mold body, the second mold body and the third mold body is parallel to the recessed direction of the mounting portion.

2. The dynamic phantom dose verification plunger according to claim 1, characterized in that: The bottom surface of the mounting portion is provided with a baffle, the baffle and the insertion rod body are integrally structured, and the baffle and the insertion rod body are enclosed to form the mounting portion in a groove shape; When the fixing portion and the insert rod body are assembled, the third mold body is connected to the baffle.

3. The dynamic phantom dose verification plunger according to claim 2, characterized in that: A through hole is arranged on the baffle plate, and the through hole penetrates the baffle plate along the recessed direction of the mounting portion, and the through hole is communicated with the mounting portion.

4. The dynamic phantom dose verification plunger according to claim 1, characterized in that: The mounting portion penetrates the plunger body along a radial direction of the plunger body.

5. The dynamic phantom dose verification plunger according to claim 4, characterized in that: The side wall of the mounting portion has a limiting groove formed by being recessed toward the insertion rod body, and along the through direction of the mounting portion, the limiting groove is smaller than the size of the mounting portion, and the side wall of the fixing portion is provided with a limiting protrusion; When the fixing portion is assembled with the insert rod body, the limiting protrusion extends into the limiting groove.

6. The dynamic phantom dose verification plunger according to any one of claims 1 to 5, characterized in that: One side of the plunger body is provided with a mounting hole for placing the ionization chamber, and the mounting hole extends along the axial direction of the plunger body.

7. The dynamic phantom dose verification plunger according to claim 6, characterized in that: One end of the mounting hole extends into the first mold body.

8. The dynamic phantom dose verification plunger according to claim 6, characterized in that: The surfaces of the second mold body and the third mold body facing each other are planes.

9. A dynamic phantom dose verification device, characterized in that: It comprises a radiation part and a chest and abdomen phantom, and a dynamic phantom dose verification rod as described in any one of claims 1 to 8; In the test state, the dynamic phantom dose verification rod is inserted into the chest and abdomen phantom.

10. The dynamic phantom dose verification device according to claim 9, characterized in that: The radiation part is located above the chest and abdomen model, and the radiation direction of the radiation part is perpendicular to the imaging film.

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