Verification phantom and verification device for radiotherapy system

Abstract

The present invention provides a verification phantom, the verification phantom has a slot, the slot is a slot for placing a film, the slot includes: a first slot and a second slot, the opening of the first slot and the opening of the second slot are both located on the first outer surface of the verification phantom, and an extraction groove is provided at the junction of the opening of the first slot and the opening of the second slot on the first outer surface. The present invention also provides a verification device for a radiotherapy system.

Description

[0001] This application is a divisional application of the Chinese application with the application date of February 21, 2019, application number 201980000893.0, and invention name “Radiotherapy system and its verification device and verification method”. Technical Field

[0002] The present invention relates to the technical field of radiotherapy, and in particular to a verification phantom and a verification device for a radiotherapy system. Background Art

[0003] The radiotherapy system generally may include: a rotating gantry and a treatment head disposed on the rotating gantry. The radiation emitted from the treatment head can be used to treat the target point of the patient's affected part. Under normal circumstances, the beam focus (i.e., the treatment isocenter) of the radiation emitted from the treatment head should coincide with the mechanical rotation isocenter of the rotating gantry. When the target is positioned at the position of the mechanical rotation isocenter, the beam focus can be accurately irradiated to the target, thereby achieving precise treatment. However, due to installation errors and other reasons, there may be a deviation between the treatment isocenter and the mechanical rotation isocenter. At this time, if the target is positioned at the mechanical rotation isocenter, the beam focus may not be accurately irradiated to the position of the target, thereby failing to achieve precise treatment.

[0004] In the related art, in order to ensure the accuracy of radiotherapy, a verification device for verifying the deviation between the treatment isocenter and the mechanical rotation isocenter is provided, such as the MIMI Phantom. Before radiotherapy, the verification device can be used to verify whether the treatment isocenter coincides with the mechanical rotation isocenter (i.e., whether there is a deviation). When there is a deviation between the treatment isocenter and the mechanical rotation isocenter, the position of the treatment bed can be adjusted in time according to the deviation, thereby improving the coincidence accuracy between the mechanical rotation isocenter and the equipment isocenter.

[0005] However, since the verification device in the related art can only verify whether the center point of the mechanical rotation isocenter and the center of the equipment are coincident, the function is relatively simple. Summary of the invention

[0006] The present application provides a verification phantom and a verification device for a radiotherapy system. The technical solution is as follows:

[0007] On the one hand, a verification phantom is provided, the verification phantom having a slot, the slot being a slot for placing a film, the slot comprising: a first slot and a second slot, the opening of the first slot and the opening of the second slot are both located on the first outer surface of the verification phantom, and an extraction groove is provided on the first outer surface at the junction of the opening of the first slot and the opening of the second slot.

[0008] Optionally, the extraction groove is connected to both the first slot and the second slot.

[0009] Optionally, the intersection of the opening of the first slot and the opening of the second slot is located at a central position of the first outer surface.

[0010] Optionally, the extraction groove is located at a central position of the first outer surface.

[0011] Optionally, the first slot is perpendicular to the second slot, and both the first slot and the second slot pass through a center point of the verification phantom.

[0012] Optionally, the cross-section of the extraction groove is circular, rectangular or triangular.

[0013] Optionally, the verification mold is provided with a first through hole for connecting the outer surface of the verification mold with the first slot, and a second through hole for connecting the outer surface of the verification mold with the second slot.

[0014] Optionally, the extension direction of the first through hole intersects with the first slot, and the intersection of the first through hole and the first slot is the center point of the verification phantom; the extension direction of the second through hole intersects with the second slot, and the intersection of the second through hole and the second slot is the center point of the verification phantom.

[0015] Optionally, the first through hole is arranged on a side surface of the verification mold, and the second through hole is arranged on a top surface of the verification mold.

[0016] Optionally, an extending direction of the first through hole is perpendicular to the first slot, and an extending direction of the second through hole is perpendicular to the second slot.

[0017] Optionally, the verification phantom is a solid structure.

[0018] Optionally, the verification phantom is in the shape of a cube or a prism.

[0019] Optionally, the material of the outer shell of the verification phantom is: organic glass.

[0020] On the other hand, a verification device for a radiotherapy system is provided, the verification device comprising: the verification phantom as described in the above aspect.

[0021] In summary, the embodiments of the present invention provide a verification phantom and a verification device for a radiotherapy system. The opening of the first slot and the opening of the second slot in the verification phantom can both be located on the first outer surface of the first verification phantom. By arranging the openings of the two slots on the same outer surface, it is convenient to insert and remove the film.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a structural schematic diagram of a verification device provided by an embodiment of the present invention;

[0025] Figure 2 is a structural schematic diagram of a first verification phantom in the verification device provided by an embodiment of the present invention;

[0026] Figure 3 is a side view of a first verification phantom in a verification device provided by an embodiment of the present invention;

[0027] Figure 4 is a structural schematic diagram of a second verification phantom in the verification device provided by an embodiment of the present invention;

[0028] Figure 5 is another structural schematic diagram of the second verification phantom in the verification device provided by an embodiment of the present invention;

[0029] Figure 6 is a structural schematic diagram of a third verification phantom in the verification device provided by an embodiment of the present invention;

[0030] Figure 7 is a side view of a verification device provided by an embodiment of the present invention;

[0031] Figure 8 is a top view of a verification device provided by an embodiment of the present invention;

[0032] Fig. 9 It is a left view of a verification device provided by an embodiment of the present invention;

[0033] Fig.10 is a method flow chart of a first verification process provided by an embodiment of the present invention;

[0034] Fig.11 is a method flow chart of a second verification process provided by an embodiment of the present invention;

[0035] Fig.12is a method flow chart of a second verification process provided by an embodiment of the present invention;

[0036] Fig.13 is a block diagram of a first verification module in a verification device provided by an embodiment of the present invention;

[0037] Fig.14 is a block diagram of a second verification module in a verification device provided by an embodiment of the present invention;

[0038] Fig.15 It is a block diagram of a third verification module in a verification device provided by an embodiment of the present invention.

[0039] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] Figure 1 FIG. 1 is a schematic diagram of a structure of a verification device for a radiotherapy system provided by an embodiment of the present invention. Figure 1 As shown, the verification device may include: at least two verification phantoms of a first verification phantom 10, a second verification phantom 20, and a third verification phantom 30. For example, Figure 1 The verification device shown includes a first verification phantom 10 , a second verification phantom 20 and a third verification phantom 30 .

[0042] refer to Figure 1 , the first verification phantom 10 has a slot 101 for placing a film. A first positioning member 40 may be provided at the center of the second verification phantom 20. A second positioning member 50 may be provided at the center of the third verification phantom 30. Moreover, the center point of the first verification phantom 10, the center point of the first positioning member 40, and the center point of the second positioning member 50 may be coaxial, that is, the center point of the first verification phantom 10, the center point of the first positioning member 40, and the center point of the second positioning member 50 may be located on the same axis. For example, Figure 1 Axis X is shown.

[0043] Optionally, the first verification phantom 10 and the third verification phantom 30 can both be used to verify the deviation between the treatment isocenter and the mechanical rotation isocenter, and the treatment isocenter can also be called the nuclear physics isocenter. The second verification phantom 20 can be used to achieve at least one of the following functions: verifying the deviation of the mechanical rotation isocenter, calibrating geometric parameters (for example, detecting whether the position of the laser light is deviated, verifying the installation error of the image acquisition component, etc.), and verifying the accuracy of image-guided positioning.

[0044] When the verification device includes a first verification phantom and a second verification phantom that can realize different functions, or a second verification phantom and a third verification phantom, or a first verification phantom, a second verification phantom and a third verification phantom, the verification device has richer functions than the verification device in the related art that can only realize a single function. When the verification device includes a first verification phantom and a third verification phantom that realize the same function, the reliability of the verification deviation of the verification device is higher. In addition, by using the verification device in advance to verify the deviation between the treatment isocenter and the mechanical rotation isocenter, or verifying the deviation of the mechanical rotation isocenter, detecting whether the position of the laser light is deviated, verifying the installation error of the image acquisition component and verifying the accuracy of the image-guided positioning, the patient can be accurately positioned according to the verification results during radiotherapy, thereby improving the reliability of radiotherapy.

[0045] In addition, since the first verification phantom 10 has a slot 101 for placing a film, when using the first verification phantom 10 to verify the deviation between the treatment isocenter and the mechanical rotation isocenter, it is only necessary to insert the film into the slot 101. Compared with the related art that requires first inserting the film into the film box and then placing the film box with the film inserted into the verification phantom, the verification device provided by the present invention is more convenient to operate. In addition, since the film box with the film inserted in the related art needs to be extracted from the verification phantom many times, after long-term use, there may be wear between the film box and the verification phantom, and the wear may affect the accuracy of detecting the deviation of the treatment isocenter. Therefore, the reliability of the verification device provided by the present invention is also higher. In addition, by integrating multiple functions into the second verification phantom 20, production costs can be saved while enriching the functions of the verification device.

[0046] It should be noted here that the verification device of the radiotherapy system provided in the embodiment of the present invention may include other verification phantoms in addition to at least two verification phantoms among the first verification phantom, the second verification phantom and the third verification phantom mentioned above, which may be the same verification phantom as the first verification phantom, the second verification phantom or the third verification phantom mentioned above, or may be other types of verification phantoms.

[0047] In summary, an embodiment of the present invention provides a verification device for a radiotherapy system. Since the verification device includes at least two verification phantoms among a first verification phantom, a second verification phantom, and a third verification phantom that can realize different functions, the verification device can realize more functions. Compared with the verification device in the related art that can only realize a single function, the verification device provided by the present invention has more functions.

[0048] Optionally, in an embodiment of the present invention, the radiotherapy system may include: a control host, an image server, an image acquisition component, a laser light, a radiation source, a treatment bed and a scanner. The control host may include a host computer and a slave computer. The image acquisition component may include: a tube and a detector arranged opposite to the tube, and may also include a detector arranged opposite to the radiation source. Of course, the detector arranged opposite to the tube and the detector arranged opposite to the radiation source may be the same detector. The image server may also be connected to the control host or the image server may be directly integrated into the control host. The laser light may be a cross-line laser light (i.e., the rays emitted by the laser light are cross-shaped rays).

[0049] The radiation source can emit radiation (such as gamma rays or X-rays) to the first verification phantom 10 and the third verification phantom 30, and the tube included in the image acquisition component can emit radiation to the second verification phantom 20. After the radiation source emits radiation to the first verification phantom 10, the treating physician can take out the film in the first verification phantom 10 and scan the irradiated film through a scanner, so that the focal spot formed on the film appears. Then, the treating physician can upload the image containing the focal spot to the image server. After the radiation source emits radiation to the third verification phantom 30, the detector arranged opposite to the radiation source can receive the radiation emitted by the radiation source and collect images according to the radiation. After the tube emits radiation to the second verification phantom 20, the detector arranged opposite to the tube can receive the radiation emitted by the radiation source and collect images according to the radiation. After that, the detector can send the collected image to the image server. The image server can analyze the acquired image (such as determining the coordinates of the center point of the received image, and determining the deviation between the treatment isocenter and the mechanical rotation isocenter), and send the analysis result to the control host. The control host can then directly adjust the position of the treatment bed according to the analysis results (such as deviation).

[0050] Optional, Figure 2 Schematic diagram of the structure of the first verification model in the verification device provided by the embodiment of the present invention. Figure 2As shown, the slot 101 of the first verification phantom 10 may include: a first slot 1011 and a second slot 1012. The insertion surface of the first slot 1011 may be perpendicular to the insertion surface of the second slot 1012, and the center point of the insertion surface of the first slot 1011 and the center point of the insertion surface of the second slot 1012 both coincide with the center point of the first verification phantom 10.

[0051] When using the first verification phantom 10 to verify the deviation between the treatment isocenter and the mechanical rotation isocenter, a film can be first inserted into the first slot 1011, and the center of the first verification phantom 10 in the verification phantom is aligned with the mechanical isocenter, and then the radiation source (the initial rotation angle of the rack can be 0 degrees) irradiates the first verification phantom 10, so that a focal spot is formed on the film inserted in the first slot 1011, and the therapist removes the film inserted in the first slot 1011, and then inserts another film into the second slot 1012, and the radiation source (the rotation angle of the rack can be 90 degrees) irradiates the first verification phantom 10, so that a focal spot is formed on the film inserted in the second slot 1012, and the therapist can remove the film inserted in the second slot 1011. The two films are scanned by a scanner to obtain two images containing the focal spot. Afterwards, the therapist can also upload the two images containing the focal spot to the image server. Since the beam focus of the radiation source and the mechanical isocenter theoretically coincide, the image server can obtain the actual coordinates of the beam focus by analyzing the two images containing the focal spot, and determine the deviation between the treatment isocenter and the mechanical rotation isocenter based on the actual coordinates of the beam focus and the coordinates of the mechanical isocenter. Afterwards, the image server can send the deviation to the control host so that the control host adjusts the position of the treatment bed according to the deviation. In addition, the control host can also store the deviation and accurately position the patient according to the deviation during radiotherapy.

[0052] Optional, reference Figure 2 The opening K1 of the first slot 1011 and the opening K2 of the second slot 1012 may both be located on the first outer surface M1 of the first verification phantom 10 .

[0053] By arranging the openings of the two slots on the same outer surface, the film can be inserted and removed conveniently.

[0054] Optional, reference Figure 3 On the first outer surface M1 , an extraction groove A may be provided at the junction of the opening K1 of the first slot 1011 and the opening K2 of the second slot 1012 .

[0055] In the embodiment of the present invention, the extraction groove A may be a groove that is recessed toward the intersection of the two slots. Furthermore, the extraction groove A may be connected to both the first slot 1011 and the second slot 1012. The treating physician may insert or extract the film from the extraction groove A. By providing the extraction groove A that is connected to the two slots respectively on the first outer surface M1, it is more convenient for the treating physician to insert the film.

[0056] Optional, reference Figure 3 The cross section of the extraction groove A may be circular, or the cross section of the extraction groove A may be other shapes, such as rectangular or triangular, etc. The cross section is a plane parallel to the first outer surface M1.

[0057] Optionally, the extraction groove A can be disposed at the intersection of the first slot 1011 and the second slot 1012 on the first outer surface M1. For example, when the intersection of the first slot 1011 and the second slot 1012 is located at the center of the first outer surface M1, the extraction groove A can be disposed at the center of the first outer surface M1.

[0058] Optionally, the film inserted into the slot may be a self-developing, wash-free film. The size of the film inserted into the slot may match the size of the slot and ensure that it does not shake, that is, the size of the film inserted into the first slot 1011 may match the size of the first slot 1011, and the size of the film inserted into the second slot 1012 may match the size of the second slot 1012. Alternatively, the shape of the film may also match the overall shape of the first slot 1011 and the second slot 1012, for example, the film may be a film composed of two sub-films that are perpendicular and intersecting to each other.

[0059] In the embodiment of the present invention, the size of the film can be cut to a size that matches the slot before the film is inserted into the slot. By setting the size of the film to a size that matches the slot, it can be ensured that the film inserted into the slot will not shake, thereby improving the reliability of verifying the deviation between the treatment isocenter and the mechanical rotation isocenter.

[0060] Figure 4 FIG. 1 is another schematic diagram of the structure of the first verification phantom 10 in the verification device provided in an embodiment of the present invention. Figure 4 As shown, the first verification mold 10 may also be provided with a first through hole T1 for connecting the outer surface of the first verification mold 10 to the first slot 1011 , and a second through hole T2 for connecting the outer surface of the first verification mold 10 to the second slot 1012 .

[0061] The extension direction of the first through hole T1 intersects with the insertion surface of the first slot 1011, and the intersection point of the first through hole T1 and the insertion surface of the first slot 1011 is the center point of the insertion surface of the first slot 1011. The extension direction of the second through hole T2 intersects with the insertion surface of the second slot 1012, and the intersection point of the second through hole T2 and the insertion surface of the second slot 1012 is also the center point of the insertion surface of the second slot 1012.

[0062] Example, reference Figure 4 The first verification mold 10 has a first through hole T1 on one side thereof and a second through hole T2 on the top thereof. The first through hole T1 extends in a direction perpendicular to the insertion surface of the first slot 1011 , and the second through hole T1 extends in a direction perpendicular to the insertion surface of the second slot 1012 .

[0063] By setting the first through hole T1 and the second through hole T2, when performing deviation verification, a needle or a colored pen core can be first used to pass through the first through hole T1 to mark the center of the film inserted in the first slot 1011; and through the second through hole T2, the center of the film inserted in the second slot 1012 is marked. Then, the focus spot image formed in the two films is obtained by irradiation of the radiation source in the image acquisition component and analysis by the scanner. Since at this time, the center point of the first verification phantom 10 theoretically coincides with the mechanical rotation isocenter, the mark can be used as a mark of the mechanical isocenter. This can facilitate the control host to determine the deviation between the subsequent mechanical isocenter and the treatment isocenter, thereby improving the accuracy and efficiency of determining the deviation.

[0064] Optionally, the first verification phantom 10 may be a solid structure, and Figure 1 , Figure 2 and Figure 4 As shown, the shape of the first verification phantom 10 may be a cube. Alternatively, the first verification phantom 10 may also be a structure of other shapes, such as a prism. The embodiment of the present invention does not limit the shape of the first verification phantom 10.

[0065] Figure 5 FIG. 2 is a schematic diagram of a structure of the second verification phantom 20 in the verification device provided in an embodiment of the present invention. Figure 5 As shown, at least three groups of calibration lines (for example, Figure 5 Only three groups of calibration lines are shown), each group of calibration lines includes two calibration lines L1 and L2 that are perpendicular to each other. Assuming that the intersection of the two calibration lines L1 and L2 included in each group of calibration lines is the target point, then reference Figure 5 It can be seen that the target points in the at least three groups of calibration lines may be coplanar.

[0066] Among the at least three groups of calibration lines, two groups of calibration lines are respectively arranged on two opposite sides of the second verification phantom 20, and one group of calibration lines is arranged on a side of the second verification phantom 20 away from a support body for supporting the second verification phantom 20. The support body may be a treatment bed or a base.

[0067] For example, suppose Figure 1 and Figure 5 As shown, the second verification model 20 is a rectangular parallelepiped structure, then refer to Figure 5 It can be seen that two mutually perpendicular marking lines L1 and L2 are respectively arranged on the top surface and two opposite side surfaces of the second verification phantom 20 .

[0068] Due to installation errors or long use time, the mechanical rotation isocenter may also deviate, so the radiotherapy system can use the second verification phantom 20 to verify the deviation of the mechanical rotation isocenter.

[0069] Optionally, when the second verification phantom 20 is used to verify the deviation of the mechanical rotation isocenter, the verification device can be placed on the treatment bed first. And the two mutually perpendicular calibration lines L1 and L2 set on each outer surface of the second verification phantom 20 coincide with the cross rays emitted by the laser lamp. Then, the control host can adjust the position of the treatment bed so that the first positioning member 40 inside the second verification phantom 20 is aligned with the mechanical rotation isocenter. At this time, the tube can irradiate the second verification phantom 20 at least twice at different angles, and accordingly, the detector installed opposite to the tube can receive the rays emitted by the radiation source and collect at least two images of the first positioning member 40 according to the rays. Then, the detector can send the at least two generated images to the image server. Then, the image server can analyze the at least two images to determine the deviation of the mechanical rotation isocenter. And send the determined deviation to the control host, so that the control host can accurately adjust the position of the treatment bed according to the deviation to avoid the influence of the deviation on the accuracy of radiotherapy. Furthermore, the control host may also store the determined deviation, so that during radiotherapy, the control host may accurately position the patient according to the deviation.

[0070] Optionally, the control host may also pre-store the relative position of the center point of the first verification phantom 10 and the center point of the first positioning member 40 (i.e., the coordinates of the positions of the first verification phantom 10 and the second verification phantom 20). After the control host aligns the first positioning member 40 with the center point of the mechanical rotation isocenter according to the deviation, the position of the treatment bed may be adjusted according to the pre-stored relative position, so that the center point of the first verification phantom 10 is aligned with the center point of the mechanical rotation isocenter.

[0071] Optionally, in the embodiment of the present invention, two mutually perpendicular calibration lines L1 and L2 may be engraved on the outer surface (such as the top surface and two opposite side surfaces) of the second verification phantom 20. Alternatively, two mutually perpendicular calibration lines L1 and L2 may be printed on the outer surface of the second verification phantom 20. Alternatively, two mutually perpendicular lines may be attached to the outer surface of the second verification phantom 20 as the calibration lines L1 and L2.

[0072] In an embodiment of the present invention, the radiotherapy system may include three laser lamps, and each laser lamp may emit a cross-shaped ray. One of the laser lamps may be arranged opposite to the rotating gantry (for example, it may be arranged on the wall opposite to the rotating gantry), and the setting height of the laser lamp may be higher than the height of the rotating gantry, and the laser lamp may be used to verify whether the patient is lying straight on the treatment bed. The remaining two laser lamps may be arranged on the left and right sides of the rotating gantry (for example, they may be arranged on the walls on the left and right sides), and each of the remaining two laser lamps may emit a longitudinal ray and a transverse ray, respectively, and the longitudinal ray and the transverse ray emitted by each laser lamp may be perpendicular to each other (i.e., intersecting into a cross-shaped ray).

[0073] The intersection of the cross-shaped rays emitted by the three laser lamps is the reference point for positioning the patient, that is, the reference coordinate for positioning the phantom. Therefore, by setting two mutually perpendicular calibration lines L1 and L2 on the top surface and two opposite side surfaces of the second verification phantom 20, it is possible to detect whether the rays emitted by the laser lamps are mutually perpendicular, and then detect whether the position of the laser lamps is deviated. When a position deviation of the laser lamp is detected, the position of the laser lamp can be adjusted in time according to the deviation, further ensuring the reliability of radiotherapy.

[0074] Optional, such as Figure 5 As shown, a plurality of third positioning members 60 may be further provided in the second verification phantom 20. Furthermore, the plurality of third positioning members 60 are not coplanar, and the number of the third positioning members 60 is not less than 4 ( Figure 5 Four third positioning members 60 are shown in FIG.

[0075] A plurality of third positioning member pipes G3 corresponding to the plurality of third positioning members 60 may also be provided in the second verification phantom 20. Each third positioning member 60 may be located in a corresponding third positioning member pipe G3.

[0076] Example, reference Figure 5 , four third positioning member pipes G3 are arranged in the second verification phantom 20, and each of the four third positioning members 60 can be located in one third positioning member pipe G3 respectively. Figure 1 and Figure 5As shown, a first positioning member pipe G1 may also be provided in the second verification phantom 20 , and the first positioning member 40 may be located in the first positioning member pipe G1 .

[0077] Optional, such as Figure 1 and Figure 5 As shown, the shape of the first positioning member 40 and the third positioning member 60 can both be spheres, so the first positioning member 40 can also be called the first positioning ball, and the third positioning member 60 can also be called the third positioning ball. Correspondingly, the diameters of the first positioning member 40 and the third positioning member 60 can both be 6 millimeters (mm). The distance between any two third positioning members is equal. That is, for any two third positioning members 60 among the multiple third positioning members 60, the spacing between the two third positioning members 60 in the first direction and the spacing in the second direction can both be 60mm. Among them, the first direction is perpendicular to the second direction. The distance between each third positioning member 60 among the multiple third positioning members 60 and the first positioning member 40 can be (approximately 51.96mm).

[0078] For example, suppose Figure 1 and Figure 5 As shown, the second verification phantom 20 is a cube, then the first direction may be the length direction of the second verification phantom 20, and the second direction may be the width direction of the second verification phantom 20; or, the first direction may be the length direction of the second verification phantom 20, and the second direction may be the height direction of the second verification phantom 20; or, the first direction may be the width direction of the second verification phantom 20, and the second direction may be the height direction of the second verification phantom 20. Figure 5 It can be seen that the distance d1 between the two third positioning members 60 in the width direction of the second verification mold 20 is 60 mm, and the distance d2 between the two third positioning members 60 in the length direction of the second verification mold 20 is also 60 mm.

[0079] In the embodiment of the present invention, when the first positioning member 40 and the plurality of third positioning members 60 satisfy the above-mentioned geometric relationship, the second verification phantom 20 can also be used as a geometric calibration phantom, that is, the second verification phantom 20 can be used to detect geometric calibration parameters in the radiotherapy system, such as the installation error of the image acquisition component (i.e., the detector or the tube). The second verification phantom 20 can also be used to verify the accuracy of the image-guided positioning.

[0080] For example, the first positioning member 40 can be used to simulate the target point of the patient's affected part, and the plurality of third positioning members 60 can be used to simulate the reference points located around the target point. Since the treating physician may make errors when positioning the patient, in order to verify the accuracy of the image-guided positioning correction, the image acquisition component can acquire the image of the first positioning member 40 and the plurality of third positioning members 60, and determine whether the target point position (or other point positions except the target point) and its actual position meet the requirements of the relevant standards according to the CT plan of the second verification phantom 20.

[0081] Optionally, in order to avoid unnecessary influence of the material of the positioning ball on radiotherapy. When the second verification phantom 20 is used for CT scanning and treatment planning, the material density of the first positioning member 40 and the plurality of third positioning members 60 can be close to the bone density of the human body. For example, the material of the first positioning member 40 and the plurality of third positioning members 60 can be at least one of aluminum, Teflon, glass or ceramic. The embodiment of the present invention is not limited to this.

[0082] Optionally, the second verification phantom 20 may also be a solid structure. Figure 1 and Figure 5 It can be seen that the shape of the second verification phantom 20 can be a cuboid.

[0083] Figure 6 FIG. 1 is a schematic diagram of a structure of the third verification model 30 in the verification device provided in an embodiment of the present invention. Figure 6 As shown, the third verification phantom 30 may be a shell with a hollow interior.

[0084] Accordingly, in order to make the second positioning member 50 be located at the center of the third verification phantom 30, refer to Figure 1 and Figure 6 , a second positioning member pipe G2 may be provided inside the housing. In this case, the second positioning member 50 may be provided inside the second positioning member pipe G2. Optionally, the first positioning member pipe G1, the second positioning member pipe G2 and the third positioning member pipe G3 may all be referred to as fixed position measuring rods.

[0085] Optionally, when the third verification phantom 30 is used to verify the deviation between the treatment isocenter and the mechanical rotation isocenter, a radiation source can be used to irradiate the third verification phantom 30 at least twice at different angles, and a detector installed relative to the radiation source can receive the radiation emitted by the radiation source and collect at least two images based on the received radiation. Then, the detector can send the at least two generated images to an image server. The image server analyzes the at least two images to obtain the coordinates of the center point of the at least two images (i.e., the coordinates of the second positioning member 50). Then, the image server can determine the actual coordinates of the beam focus based on the coordinates of the second positioning member 50, and then determine the deviation between the treatment isocenter and the mechanical rotation isocenter. In addition, the image server can also send the deviation to the control host, and the control host can accurately adjust the position of the treatment bed based on the deviation. In addition, the control host can also store the deviation.

[0086] By designing the third verification phantom 30 as a hollow shell, the problem of different degrees of attenuation of the radiation (such as cobalt source radiation) emitted from different angles by the radiation source when irradiating the second positioning member 50 for imaging can be avoided due to the different thicknesses of each outer surface of the third verification phantom 30. In addition, the problem of uneven brightness of the light spot generated on the second positioning member 50 during imaging, which makes it difficult to analyze the image later, can be avoided.

[0087] Optionally, the material of the second positioning member 50 may be metal tungsten, and the second positioning member 50 may be a sphere, so the second positioning member 50 may also be called a tungsten bead, and the diameter of the second positioning member may be 7 mm. Figure 1 and Figure 6 It can be seen that the third verification phantom 30 may be in the shape of a cuboid. Alternatively, the third verification phantom 30 may also be in other shapes, for example, the third verification phantom 30 may be in the shape of a hemisphere for a beautiful structure. This embodiment of the present invention does not limit this.

[0088] Figure 7 is a side view of a verification device provided by an embodiment of the present invention, such as Figure 7 As shown, the verification device includes: a first verification phantom 10, a second verification phantom 20 and a third verification phantom 30. The first verification phantom 10, the second verification phantom 20 and the third verification phantom 30 can be arranged in sequence along the length direction Y of the treatment bed.

[0089] Figure 8 It is a top view of a verification device provided by an embodiment of the present invention. Fig. 9 1 is a left view of a verification device provided by an embodiment of the present invention. Figures 7 and 8It can be seen that in the embodiment of the present invention, the first verification phantom 10, the second verification phantom 20 and the third verification phantom 30 can be connected in sequence along the length direction of the treatment bed. The first verification phantom 10 can be a cube, the second verification phantom 20 can be a cuboid, and the third verification phantom 30 can be a hemisphere. Fig. 9 It can be seen that the opening K1 of the first slot and the opening K2 of the second slot of the first verification mold 10 are both located on the same outer surface, and an extraction groove A communicating with both the first slot and the second slot is also provided on the outer surface.

[0090] Optionally, a pasting tool (such as medical glue) may be used to sequentially paste the first verification phantom 10, the second verification phantom 20, and the third verification phantom 30, and the corresponding distance between the first verification phantom 10 and the second verification phantom 20, and the distance between the second verification phantom 20 and the third verification phantom 30 are all 0. Alternatively, a connecting component (such as a connecting rod) may be used to sequentially connect the first verification phantom 10, the second verification phantom 20, and the third verification phantom 30, and the corresponding distance between the first verification phantom 10 and the second verification phantom 20, and the distance between the second verification phantom 20 and the third verification phantom 30 may be 0 or non-0. The embodiments of the present invention are not limited to this.

[0091] In addition, when the verification device includes the third verification phantom 30, since the second positioning member 50 made of metal material is arranged at the center of the third verification phantom 30, in order to avoid the second positioning member 50 affecting the verification result when the deviation between the treatment isocenter and the mechanical rotation isocenter is verified by the third verification phantom 30 under MRI scanning, the third verification phantom 30 can be detachably connected to the first verification phantom 10 or the second verification phantom 20, that is, the third verification phantom 30 can be detachable.

[0092] Optionally, in the embodiment of the present invention, refer to Figures 7 to 9 The verification device may further include a base 70, and at least one of the first verification phantom 10, the second verification phantom 20 and the third verification phantom 30 may be disposed on the base 70. The base 70 may be disposed on a treatment bed.

[0093] Optionally, the first verification phantom 10, the second verification phantom 20 and the third verification phantom 30 can be connected in sequence and fixed to the base 70 by a fixing member (such as a screw); or the first verification phantom 10, the second verification phantom 20 and the third verification phantom 30 can also be connected in sequence and placed directly on the treatment bed without providing a base. This embodiment of the present invention is not limited to this.

[0094] In the embodiment of the present invention, a first verification model 10, a second verification model 20 and a third verification model 30 with different functions are sequentially connected to form a verification device. Compared with the verification device in the related art that can only realize a single function, the verification device provided by the embodiment of the present invention has richer functions.

[0095] Optionally, in the embodiment of the present invention, the outer shells of the first verification phantom 10, the second verification phantom 20, and the third verification phantom 30 can all be made of organic glass. Since organic glass has little blocking effect on radiation, that is, the attenuation of radiation passing through the organic glass is small, the reliability of detecting the deviation between the treatment isocenter and the mechanical rotation isocenter is ensured. In addition, the cost of organic glass is also low.

[0096] In summary, an embodiment of the present invention provides a verification device for a radiotherapy system. Since the verification device includes at least two verification phantoms among a first verification phantom, a second verification phantom, and a third verification phantom that can realize different functions, the verification device can realize more functions. Compared with the verification device in the related art that can only realize a single function, the verification device provided by the present invention has more functions.

[0097] The embodiment of the present invention also provides a radiotherapy system. The radiotherapy system may include: Figures 1 to 9 Any of the verification devices shown and radiotherapy equipment.

[0098] Optionally, the radiotherapy equipment may include: a radiation source and a treatment bed. On this basis, the radiotherapy equipment may also include: an image acquisition component, the image acquisition component includes a detector arranged relative to the radiation source, and / or an imaging device (including a tube and a flat panel detector arranged relative to it). The radiotherapy system may also include: a control host, an image server, a scanner and three laser lamps.

[0099] The verification device may be arranged on the treatment bed, the image acquisition component may be connected to the image server, the image server may be connected to the control host, and the control host may be connected to the treatment bed. Alternatively, the image server may be directly integrated into the control host. The radiation source may be the radiation source of the treatment head in the radiotherapy device, that is, the radiation emitted by the radiation source may also be used to irradiate the target of the patient, thereby performing radiotherapy on the patient.

[0100] In an embodiment of the present invention, the scanner can be used to scan the film in the verification device after irradiation with a radiation source, so that the focal spot formed on the film appears, and the treating physician can send the image containing the focal spot to the image server. The image acquisition component and the radiation source can be used to acquire the image of the verification device and send the acquired image to the image server. The image server can be used to analyze the acquired image and determine the deviation (such as determining the deviation between the treatment isocenter and the mechanical rotation isocenter) based on the analysis result, and the image server can also send the determined deviation to the control host. The control host can be used to adjust the position of the treatment bed according to the received deviation, and the control host can store the deviation. Each laser lamp can be used to emit rays to the verification device. Optionally, the rays emitted by the laser lamp can be cross-shaped rays.

[0101] Optionally, the control host may include a host computer and a slave computer, the host computer may be connected to the slave computer, and the slave computer may be connected to other components of the radiotherapy system (such as a treatment bed and an image acquisition component). The host computer may be used to send control instructions to the slave computer, and the slave computer may control the working state of other components according to the received control instructions.

[0102] In summary, an embodiment of the present invention provides a radiotherapy system, which includes a verification device. The radiation source in the radiotherapy equipment and the tube in the image acquisition assembly can emit rays to the verification device, and the detector arranged opposite to the radiation source and the detector arranged opposite to the tube can receive the rays and collect images according to the rays, and the detector can send the collected images to the image server. The scanner can scan the film in the verification device after the radiation source is irradiated, so that the focal spot formed on the film appears, and the therapist can send the image containing the focal spot to the image server. The image server can analyze the acquired image to determine the deviation between the treatment isocenter and the mechanical rotation isocenter or determine the deviation of the mechanical rotation isocenter, and send the deviation to the control host, which accurately positions the patient according to the deviation, thereby improving the accuracy of radiotherapy and ensuring the quality of radiotherapy.

[0103] An embodiment of the present invention provides a verification method for a radiotherapy system, which may include: at least one verification process among a first verification process, a second verification process and a third verification process.

[0104] Fig.10 is a flow chart of a method for a first verification process provided by an embodiment of the present invention. Fig.10 As shown, the first verification process may include:

[0105] Step 1001: Acquire a first image and a second image.

[0106] In an embodiment of the present invention, the first image and the second image may be obtained by respectively irradiating two films inserted into the slot of the first verification phantom using a beam, and then scanning the two irradiated films. For example, the first image may be obtained by irradiating a film inserted into the first slot of the first verification phantom using a beam by a radiation source, and then scanning the irradiated film. The second image may be obtained by irradiating a film inserted into the second slot of the first verification phantom using a beam by the radiation source, and then scanning the irradiated film.

[0107] For example, the radiation source can emit radiation to the verification device, and a focal spot will be formed at the center of the film inserted in the first verification phantom. Then the treating physician can take the film out of the first verification phantom and scan the film using a scanner, so that the focal spot formed on the film appears. Finally, the treating physician can also upload the first image and the second image containing the focal spot to the image server. That is, the image server can obtain the first image and the second image.

[0108] In addition, after placing the film in the slot, you can also use a needle or a colored pen core to pass through the through hole and mark the center positions of the two films respectively. Since the center of the first verification phantom is aligned with the mechanical rotation isocenter at this time, the mark can be used as the theoretical coordinates of the mechanical rotation isocenter. Accordingly, it is convenient for the image server to determine the deviation between the treatment isocenter and the mechanical rotation isocenter based on the mark, that is, the accuracy and efficiency of determining the deviation between the treatment isocenter and the mechanical rotation isocenter can be improved.

[0109] Step 1002: determine the actual coordinates of the beam focus of the beam according to the first image and the second image, and determine the deviation between the treatment isocenter and the mechanical rotation isocenter according to the actual coordinates of the beam focus.

[0110] Since the imaging point is the beam focus of the ray emitted by the radiation source, the image server can also determine the actual coordinates of the beam focus of the beam according to the first image and the second image.

[0111] Among them, the coordinates of the focal spot in the first image and the second image are both coordinates in the two-dimensional image coordinate system, so the image server can convert the coordinates of the focal spot in the first image and the coordinates of the focal spot in the second image, so as to obtain the coordinates of the focal spot in the three-dimensional device coordinate system, which is the actual coordinates of the beam focus. Further, after obtaining the actual coordinates of the beam focus, the image server can also determine the deviation of the coordinates of the treatment isocenter and the mechanical rotation isocenter according to the actual coordinates of the beam focus (that is, the actual coordinates of the treatment isocenter). Then, the image server can send the determined deviation to the control host so that the control host stores the determined deviation. After that, when performing radiotherapy, the control host can directly accurately position the patient according to the deviation. Alternatively, after verifying the deviation, the control host can directly adjust the position of the treatment bed according to the deviation, so that the center point of the first verification phantom is aligned with the beam focus.

[0112] Since the center point of the first verification phantom can be used to simulate the target point of the affected part, the target point can be aligned with the actual beam focus after adjusting the position of the treatment bed. This avoids the problem that the beam focus cannot accurately irradiate the target point when the treatment center point deviates due to installation errors, improves the accuracy of radiotherapy, and ensures the quality of radiotherapy.

[0113] Fig.11 : is a flow chart of a method for a second verification process provided by an embodiment of the present invention. Fig.11 As shown, the second verification process may include:

[0114] Step 1101 : adjusting the position of the second verification phantom so that a first positioning member disposed at the center of the second verification phantom is aligned with the center point of the mechanical rotation.

[0115] In an embodiment of the present invention, the rays emitted by the laser lamp may be cross-shaped rays. Theoretically, when the second verification phantom is placed on the treatment bed, the intersection of the cross rays emitted by the laser lamp is the reference coordinate when the phantom is positioned. Furthermore, when the two calibration lines set on each outer surface of the second verification phantom coincide with the cross rays emitted by the laser lamp, the position of the treatment bed can be adjusted first, and the second verification phantom can be moved to the treatment space so that the first positioning member set inside the second verification phantom is aligned with the mechanical rotation isocenter. At this point, the center point of the second verification phantom (i.e., the first positioning member) is the theoretical coordinate of the mechanical rotation isocenter.

[0116] Optionally, the control host can be connected to the treatment bed, and the treating physician can first place the verification device on the upper bed position of the treatment bed. Then, the control host can adjust the position of the treatment bed so that each calibration line set on each outer surface of the second verification phantom coincides with the ray emitted by the laser lamp. Alternatively, the treating physician can directly adjust the position of the second verification phantom so that each calibration line set on each outer surface of the second verification phantom coincides with the ray emitted by the laser lamp. Then, the control host can continue to adjust the position of the treatment bed so that the center point of the second verification phantom is aligned with the center point of the mechanical rotation.

[0117] Step 1102: Acquire at least two third images.

[0118] In an embodiment of the present invention, after the second verification phantom is moved to align its center point with the mechanical isocenter coordinate, the image server can obtain at least two third images. Each of the third images can be an image obtained by the image acquisition component capturing the first positioning member in the second verification phantom.

[0119] Optionally, the tube in the image acquisition component can emit X-rays to the second verification phantom, and the detector arranged opposite to the tube can receive the X-rays, thereby realizing image acquisition of the first positioning member. Further, the detector can send the acquired third image to the image server. Accordingly, the image server can obtain at least two third images.

[0120] Step 1103: Determine the deviation of the center point of mechanical rotation according to the first coordinate of the first positioning member in each third image and the reference coordinate of the center point in each third image.

[0121] After the image server acquires at least two of the three images, it can further acquire the first coordinates of the first positioning member in each third image and the reference coordinates of the center point in each third image. Then, the image server can also determine the deviation of the mechanical rotation isocenter based on the acquired first coordinates and reference coordinates. Since at this time, the center point of the second verification phantom is theoretically aligned with the mechanical rotation isocenter, the image server can determine the reference coordinates of the center point of the acquired third image as the theoretical coordinates of the mechanical rotation isocenter. The first coordinates of the first positioning member are the actual coordinates of the mechanical rotation isocenter. The above theoretical coordinates and actual coordinates are both coordinates in the two-dimensional image coordinate system.

[0122] Furthermore, the image server can also perform coordinate conversion on the at least two first coordinates obtained to obtain the actual coordinates of the mechanical rotation isocenter in the three-dimensional device coordinate system, and can perform coordinate conversion on the at least two reference coordinates obtained to obtain the theoretical coordinates of the mechanical rotation isocenter in the three-dimensional device coordinate system. Then, the image server can calculate the deviation of the mechanical rotation isocenter based on the actual coordinates and theoretical coordinates of the determined mechanical isocenter, and send the determined deviation to the control host. Optionally, the control host can also store the deviation of the mechanical rotation isocenter so that the patient can be accurately positioned directly based on the deviation during subsequent radiotherapy.

[0123] Fig.12 : is a flow chart of a method for a third verification process provided by an embodiment of the present invention. Fig.12 As shown, the method may include:

[0124] Step 1201: Acquire at least two fourth images.

[0125] Among them, the fourth image can be an image acquired after the radiation source in the image acquisition component irradiates the second positioning member with a beam. Optionally, the radiation source in the image acquisition component can irradiate the third verification phantom at least twice, that is, the radiation source can emit at least two rays to the third verification phantom. Correspondingly, the detector arranged opposite to the radiation source can receive the ray and acquire at least two fourth images based on the received ray. Moreover, the detector can send the generated at least two fourth images to the image server. That is, the image server can obtain the image acquired by the image acquisition component.

[0126] Step 1202: determine the actual coordinates of the beam focus according to each fourth image obtained, and determine the deviation between the treatment isocenter and the mechanical rotation isocenter according to the actual coordinates of the beam focus.

[0127] Since the imaging point is the beam focus of the ray emitted by the radiation source, after the image server acquires at least two fourth images, the actual coordinates of the beam focus can be determined according to each of the at least two images.

[0128] The image server can analyze each of the at least two fourth images obtained to obtain the coordinates of the center point of each fourth image. For example, the image server can obtain two images, and analyze the two fourth images to obtain the coordinates of the center point of each fourth image. Since the actual coordinates of the beam focus are the coordinates in the three-dimensional device coordinate system, and the coordinates of the center point of the fourth image are the coordinates in the two-dimensional image coordinate system, by obtaining at least two fourth images, the image server can perform coordinate conversion on the coordinates of the center point of each of the at least two fourth images to obtain the coordinates of the center point of the fourth image in the three-dimensional device coordinate system. Accordingly, the image server can determine the coordinates of the center point of the fourth image in the three-dimensional device coordinate system as the actual coordinates of the beam focus.

[0129] Furthermore, after the image server obtains the actual coordinates of the beam focus, it can also determine the deviation between the treatment isocenter and the mechanical rotation isocenter according to the actual coordinates of the beam focus (i.e., the actual coordinates of the treatment isocenter). Then, the image server can send the determined deviation to the control host, which adjusts the position of the treatment bed according to the deviation, so that the center point of the third verification phantom is aligned with the beam focus. In addition, the control host can also store the determined deviation, and then, when performing radiotherapy, the control host can directly accurately position the patient according to the deviation.

[0130] Since the target of the affected part can be simulated by the center point of the third verification phantom, the target can be aligned with the actual beam focus after adjusting the position of the treatment bed. This avoids the problem that the beam focus cannot accurately irradiate the target when the treatment center point deviates due to installation errors, improves the accuracy of radiotherapy, and ensures the quality of radiotherapy.

[0131] In summary, an embodiment of the present invention provides a verification method for a radiotherapy system. Since the method includes at least one of the first verification process, the second verification process, and the third verification process, the radiotherapy system can use a verification device to implement at least one of the functions of verifying the deviation between the treatment isocenter and the mechanical rotation isocenter and verifying the deviation of the mechanical rotation isocenter. Therefore, the verification method for the radiotherapy system can implement relatively rich functions.

[0132] Optionally, when the method includes: a first verification process, a second verification process, and a third verification process. After executing the second verification process (i.e., the above step 1103), the radiotherapy system may further adjust the position of the treatment couch according to the deviation so that the first positioning member in the second verification phantom is aligned with the mechanical rotation isocenter. For example, the control host may adjust the position of the treatment couch according to the received deviation so that the first positioning member in the second verification phantom is aligned with the mechanical rotation isocenter.

[0133] Further, the radiotherapy system can adjust the position of the treatment bed according to the relative position between the center point of the first verification phantom and the first positioning member, so that the center point of the first verification phantom is aligned with the center point of the mechanical rotation. Optionally, the control host can pre-store the relative position between the center point of the first verification phantom and the first positioning member (that is, the control host can pre-store the coordinates of the first verification phantom and the second verification phantom in the three-dimensional device coordinate system). Accordingly, the control host can adjust the position of the treatment bed according to the relative position between the center point of the first verification phantom and the first positioning member, so that the center point of the first verification phantom is aligned with the center point of the mechanical rotation.

[0134] In addition, after aligning the center point of the first verification phantom with the mechanical rotation isocenter, the image server in the radiotherapy system can also use the first verification phantom to continue to verify whether there is a deviation between the treatment isocenter and the mechanical rotation isocenter. That is, the first verification process (i.e., steps 1001 and 1002) can be continued.

[0135] After executing the first verification process (i.e., the above step 1002), the radiotherapy system can also adjust the position of the treatment bed according to the relative position between the second positioning member and the first positioning member, so that the second positioning member is aligned with the center point of the mechanical rotation. Optionally, the control host can pre-store the relative position between the second positioning member and the first positioning member set at the center of the third verification phantom (i.e., the control host can also pre-store the coordinates of the third verification phantom in the three-dimensional device coordinate system). Accordingly, the control host can adjust the position of the treatment bed according to the relative position between the second positioning member and the first positioning member, so that the second positioning member is aligned with the center point of the mechanical rotation.

[0136] In addition, after aligning the second positioning member with the mechanical rotation isocenter, the image server in the radiotherapy system can also use the third verification phantom to continue to verify whether there is a deviation between the treatment isocenter and the mechanical rotation isocenter. That is, the third verification process (i.e., the above steps 1201 and 1202) can be continued. That is, the radiotherapy system can sequentially perform the second verification process, the first verification process, and the third verification process.

[0137] Optionally, the control host may also pre-store the relative position between the second positioning member provided inside the third verification phantom and the center point of the first verification phantom (i.e., the control host may pre-store the coordinates of the first verification phantom and the third verification phantom in the three-dimensional device coordinate system). Accordingly, after executing the third verification process (i.e., the above step 1202), the control host may also adjust the position of the treatment bed according to the relative position so that the center point of the first verification phantom is aligned with the center point of the mechanical rotation.

[0138] However, errors may occur when the host computer adjusts the position of the treatment bed, that is, although the host computer has adjusted the second positioning member to align with the actual beam focus. However, when the host computer adjusts the position of the treatment bed again, the beam focus may deviate again, that is, the center point of the first verification phantom may not be aligned with the actual beam focus. At this time, in order to ensure the accuracy of radiotherapy, the image server and the control host in the radiotherapy system can continue to perform the first verification process, that is, continue to verify whether there is a deviation between the center point of the first verification phantom and the center point of the mechanical rotation. Alternatively, after the first verification process is completed, that is, according to the deviation between the actual coordinates of the beam focus and the coordinates of the center point of the mechanical rotation, the position of the treatment bed is adjusted so that the center point of the first verification phantom is aligned with the beam focus, and the control host can also adjust the position of the treatment bed according to the relative position so that the second positioning member is aligned with the center point of the mechanical rotation. Correspondingly, in order to further ensure that the second positioning member is aligned with the actual beam focus after the treatment bed is adjusted, and to improve the accuracy of radiotherapy, the control host can also continue to perform the above-mentioned third verification process. That is, the first verification process and the third verification process can verify the deviation between the treatment isocenter and the mechanical rotation isocenter, thereby improving the reliability of determining the deviation.

[0139] In summary, an embodiment of the present invention provides a verification method for a radiotherapy system. Since the method includes at least one of the first verification process, the second verification process, and the third verification process, the radiotherapy system can use a verification device to implement at least one of the functions of verifying the deviation between the treatment isocenter and the mechanical rotation isocenter and verifying the deviation of the mechanical rotation isocenter. Therefore, the verification method for the radiotherapy system can implement relatively rich functions.

[0140] An embodiment of the present invention provides a verification device, which may include: at least one verification module among a first verification module, a second verification module and a third verification module. For example, the verification device may include at least two verification modules.

[0141] Fig.13 is a block diagram of a first verification module provided by an embodiment of the present invention. Fig.13 As shown, the first verification module may include:

[0142] The first acquisition submodule 1301 is used to acquire a first image and a second image.

[0143] The first image and the second image may be obtained by respectively irradiating two films inserted into the slot of the first verification phantom with a beam and then scanning the two irradiated films respectively.

[0144] The first determination submodule 1302 is used to determine the actual coordinates of the beam focus of the beam according to the first image and the second image, and determine the deviation between the treatment isocenter and the mechanical rotation isocenter according to the actual coordinates of the beam focus.

[0145] Fig.14 is a block diagram of a second verification module provided by an embodiment of the present invention. Fig.14 As shown, the second verification module may include:

[0146] The adjusting submodule 1401 is used to adjust the position of the second verification phantom so that the first positioning member provided at the center of the second verification phantom is aligned with the center point of the mechanical rotation.

[0147] The second acquisition submodule 1402 is used to acquire at least two third images.

[0148] Each third image is an image obtained by capturing an image of the first positioning member.

[0149] The second determination submodule 1403 is used to determine the deviation of the mechanical rotation isocenter according to the first coordinates of the first positioning member in the third image and the reference coordinates of the center point of each of the third images.

[0150] Fig.15 is a block diagram of a third verification module provided by an embodiment of the present invention. Fig.15 As shown, the third verification module may include:

[0151] The third acquisition submodule 1501 is used to acquire at least two fourth images.

[0152] The fourth image is an image acquired after the second positioning member disposed at the center of the third verification phantom is irradiated with a beam.

[0153] The third determination submodule 1502 is used to determine the actual coordinates of the beam focus according to each fourth image acquired, and determine the deviation between the treatment isocenter and the mechanical rotation isocenter according to the actual coordinates of the beam focus.

[0154] Optionally, each submodule in the first verification module, the second verification module, and the third verification module can be set in the same device in the radiotherapy system. For example, they can be set in the control host. Alternatively, each submodule in the first verification module, the second verification module, and the third verification module can be set in different devices in the radiotherapy system. For example, the first acquisition submodule 1301 in the first verification module, the second acquisition submodule 1402 in the second verification module, and the third acquisition submodule 1501 in the third verification module can all be set in the image acquisition component, and the first determination submodule 1302 in the first verification module, the second determination submodule 1403 in the second verification module, and the third determination submodule 1502 in the third verification module can all be set in the image server.

[0155] In summary, the embodiment of the present invention provides a verification device for a radiotherapy system. Since the device includes at least one of the first verification module, the second verification module and the third verification module that can realize different functions, the verification device for the radiotherapy system has rich functions.

[0156] Regarding the verification device for the radiotherapy system in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0157] An embodiment of the present invention provides a verification device for a radiotherapy system. The positioning device may include: a processor and a memory, wherein the memory stores instructions, and the instructions can be loaded and executed by the processor to implement the following Figures 10 to 12 A method for validating any of the radiation therapy systems shown.

[0158] In addition, an embodiment of the present invention provides a storage medium, in which instructions are stored. When the storage medium is run on a processing component, the processing component can be caused to execute the following Figures 10 to 12 A method for validating any of the radiation therapy systems shown.

[0159] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the radiotherapy system and the verification device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0160] The above descriptions are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A verification phantom, characterized in that: The verification phantom has a slot, the slot is a slot for placing a film, the slot includes: a first slot and a second slot, the opening of the first slot and the opening of the second slot are both located on the first outer surface of the verification phantom, and an extraction groove is provided on the first outer surface at the junction of the opening of the first slot and the opening of the second slot; The verification mold is provided with a first through hole for connecting the outer surface of the verification mold with the first slot, and a second through hole for connecting the outer surface of the verification mold with the second slot.

2. The verification phantom according to claim 1, characterized in that: The extraction groove is communicated with both the first slot and the second slot.

3. The verification phantom according to claim 1, characterized in that: An intersection point of an opening of the first slot and an intersection point of an opening of the second slot is located at a central position of the first outer surface.

4. The verification phantom according to claim 3, characterized in that: The extraction groove is located at the center of the first outer surface.

5. The verification phantom according to claim 1, characterized in that: The first slot is perpendicular to the second slot, and both the first slot and the second slot pass through the center point of the verification phantom.

6. The verification phantom according to claim 1, characterized in that: The cross section of the extraction groove is circular, rectangular or triangular.

7. The verification phantom according to claim 1, characterized in that: An extension direction of the first through hole intersects with the first slot, and an intersection point of the first through hole and the first slot is a center point of the verification phantom; An extension direction of the second through hole intersects with the second slot, and an intersection point of the second through hole and the second slot is a center point of the verification phantom.

8. The verification phantom according to claim 1, characterized in that: The first through hole is arranged on one side surface of the verification mold, and the second through hole is arranged on the top surface of the verification mold.

9. The verification phantom according to claim 1, characterized in that: An extending direction of the first through hole is perpendicular to the first slot, and an extending direction of the second through hole is perpendicular to the second slot.

10. The verification phantom according to claim 1, characterized in that: The verification phantom is a solid structure.

11. The verification phantom according to claim 1, characterized in that: The verification phantom is in the shape of a cube or a prism.

12. The verification phantom according to claim 1, characterized in that: The material of the outer shell of the verification phantom is: organic glass.

13. A verification device for a radiotherapy system, characterized in that: The verification device comprises: a verification phantom as described in any one of claims 1 to 12.

Images