Radiotherapy quality control die body

Abstract

The utility model provides a radiotherapy quality control die body, which belongs to the technical field of radiotherapy equipment and is characterized in that a motion module is mounted in a shell, a die body plug-in is detachably mounted on the motion module, and a motion controller is in communication connection with the motion module; the motion module comprises a base, an actuating rod and a mold body slot; the mold body insert is inserted into the mold body slot; the base is mounted on the shell; a plurality of actuating rods are movably connected between the mold body slot and the end part of the base; and the motion controller controls each actuating rod to do telescopic motion according to a set control instruction, so that pose control or continuous space multi-degree-of-freedom motion of the die body plug-in is realized. The device can be used for simulating the position and posture change of a target region between and in different times of radiotherapy, can also be used for simulating the real-time movement of the target region in different times, can be used for measuring the central point dose or the surface dose, and is used for the quality control of a radiotherapy image guide system and a radiotherapy plan and the quality control of the whole radiotherapy process; and the accuracy and safety of radiotherapy can be better ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of radiotherapy equipment, in particular to a radiotherapy quality control phantom for realizing quality control of medical imaging equipment. Background Art

[0002] As one of the important means of tumor treatment, radiotherapy occupies an important position in the field of tumor treatment. It is estimated that 60-70% of malignant tumors require radiotherapy. The urgent clinical needs have greatly promoted the development of radiotherapy technology. In particular, after the application of medical imaging technology to radiotherapy, the tumor target area to be irradiated can be more accurately delineated, and the beam can irradiate the target area more accurately, and radiotherapy has entered the era of precision radiotherapy. Medical imaging equipment can be used to obtain the position and morphological changes of the target area between and within the patient's radiotherapy fractions, and the real-time movement of the target area during treatment can be monitored. In order to ensure the quality of medical imaging equipment, the invention patent application with application number 201711237432.4 proposes a motion module for radiotherapy quality control, which is used for measuring the planning accuracy, dose accuracy and irradiation field position accuracy of the motion target area. The invention patent application with application number 202111635861.3 proposes a dynamic imaging performance test phantom for CT equipment, which can realize the linear motion and motion stroke change of the motion module. The utility model patent application with application number 202120846755.9 proposes a motion module for radiotherapy quality control, which is used to realize the reciprocating movement of the phantom detection plate in the chest simulator. The above patent can simulate a small degree of freedom of target area movement, while the real target area movement not only has position changes in three directions, but also three rotation changes. The above phantom cannot accurately simulate the target area posture and morphological changes, and cannot set the target area fixed posture according to the quality control needs, and cannot meet the quality control requirements of medical imaging equipment. Utility Model Content

[0003] The purpose of the utility model is to provide a radiotherapy quality control phantom, which can quantitatively simulate the posture changes, real-time motion and morphological changes of the target area, compare with the posture and morphological parameters obtained through medical imaging, realize the quality control of medical imaging equipment, and solve at least one technical problem existing in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a radiotherapy quality control phantom, comprising:

[0006] A housing, a motion module, a phantom plug-in, and a motion controller, wherein the motion module is installed in the housing, the phantom plug-in is detachably installed on the motion module, and the motion controller is communicatively connected to the motion module;

[0007] The motion module comprises a base, an actuating rod, and a mold body slot; the mold body plug-in is inserted into the mold body slot; the base is mounted on a shell; a plurality of actuating rods are movably connected between the mold body slot and the end of the base; the motion controller is connected to the actuator of the actuating rod, and controls each actuating rod to perform telescopic motion according to the set control instructions, so as to realize the posture control or continuous spatial multi-degree-of-freedom motion of the mold body plug-in; wherein, by controlling the telescopic length of each actuating rod, the position and posture of the mold body slot can be controlled, or the continuous multi-degree-of-freedom motion of spatial translation and / or rotation of the mold body slot can be realized.

[0008] Furthermore, the shell is a hollow structure, with supporting holes for installing the motion module on its side, and a skylight and a corresponding window cover on its upper part, so that the mold body plug-in can be installed on the motion module through the skylight.

[0009] Furthermore, handles are provided at the upper ends of both sides of the shell to facilitate the transportation of the radiotherapy quality control phantom, and a footrest is provided at the bottom of the shell, and a leveling foot can be provided on the footrest to adjust the level of the entire quality control phantom.

[0010] Furthermore, the actuator is an electric cylinder; when the electric cylinder is used as the actuating rod, the electric cylinder is connected to the base and the mold body slot respectively.

[0011] Furthermore, the actuating rod is a pneumatic cylinder or a hydraulic cylinder; when a pneumatic cylinder or a hydraulic cylinder is used, a pressure actuator is used in conjunction with the pressure actuator, and the pressure actuator is arranged in the motion controller.

[0012] Furthermore, the pressure actuator is an air pump or a hydraulic pump, which is connected to a pressure pipe to transmit pressure to the actuating rod, and transmits the pneumatic force or hydraulic force to the actuating rod to drive the actuating rod to perform telescopic movement.

[0013] Furthermore, the phantom slot is a hollow structure, made of a material that can be used for both CT imaging and magnetic resonance imaging, and the phantom plug-in can be securely placed inside it. A cable groove is provided on the side wall to facilitate the passage of the cable of the pencil-shaped ionization chamber.

[0014] Furthermore, the phantom plug-in is an integrated type, with a spherical or ellipsoidal core module embedded inside, and marking points are arranged on the core module for verifying the accuracy of multimodal imaging fusion; the phantom plug-in is provided with a finger-shaped ionization chamber mounting hole, and the end of the mounting hole passes through the center of the core module.

[0015] Furthermore, the mold plug-in is of split type, including a plurality of plug-in monomers with the same structure and arranged in a matrix, and a film slot for placing films is provided between two adjacent plug-in monomers.

[0016] Furthermore, all the actuating rods are distributed on one side of the mold body slot, with one end connected to the mold body slot and the other end connected to the base; or, all the actuating rods are evenly distributed on both sides of the mold body slot, with one end connected to the mold body slot and the other end connected to the base.

[0017] The beneficial effects of the utility model are as follows: the motion module can be used to simulate the changes in the position of the target area between and within fractions of radiotherapy, and can also simulate the real-time movement of the target area within fractions, and can measure the center point dose or surface dose, which can be used for the quality control of the radiotherapy image guidance system, the quality control of the radiotherapy plan, and the quality control of the entire radiotherapy process, so as to better ensure the accuracy and safety of radiotherapy.

[0018] Additional advantages of the present invention will be more clearly presented in the following description or learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of the radiotherapy quality control phantom described in Example 1 of the present utility model.

[0021] Figure 2 This is a schematic diagram of the shell structure of the radiotherapy quality control phantom described in Example 1 of the utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the radiotherapy quality control phantom motion module described in Example 1 of the utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the radiotherapy quality control phantom motion module plug-in described in Example 1 of the utility model.

[0024] Figure 5 This is a schematic diagram of the structural decomposition of the radiotherapy quality control phantom motion module plug-in described in Example 2 of the present utility model.

[0025] Figure 6 This is a schematic diagram of the overall structure of the radiotherapy quality control phantom described in Example 3 of the present utility model.

[0026] Among them: 1-motion controller; 2-pressure tube; 3-motion module; 4-model plug-in; 5-housing; 6-pressure actuator; 7-foot; 8-support hole; 9-handle; 10-skylight; 11-window cover; 12-base; 13-cable groove; 14-model slot; 15-hinge; 16-actuator rod; 17-core module; 18-ionization chamber mounting hole; 19-marking point; 20-film slot; 21-film; 22-cable. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below by the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0028] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which the present invention belongs.

[0029] It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have a meaning consistent with that in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless as defined herein.

[0030] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or groups thereof.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0032] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the description of this specification, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present technology and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present technology.

[0034] Unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in this technology can be understood according to specific circumstances.

[0035] To facilitate the understanding of the present invention, the present invention is further explained below with reference to specific embodiments in conjunction with the accompanying drawings, and the specific embodiments do not constitute a limitation on the embodiments of the present invention.

[0036] Those skilled in the art should understand that the drawings are merely schematic diagrams of embodiments, and the components in the drawings are not necessarily necessary for implementing the present invention.

[0037] Example 1

[0038] like Figures 1 to 4 As shown, in this embodiment, a radiotherapy quality control phantom is provided, which can quantitatively simulate the posture changes, real-time motion and morphological changes of the target area, and compare them with the posture and morphological parameters obtained through medical imaging to achieve quality control of medical imaging equipment.

[0039] The radiotherapy quality control phantom described in this embodiment includes: a shell 5, a motion module 3, a phantom plug-in 4, and a motion controller 1, wherein the motion module 3 is installed in the shell 5, and the phantom plug-in 4 is detachably installed on the motion module 3.

[0040] In this embodiment, the shell 5 is a hollow structure, and a support hole 8 for installing the motion module is provided on its side. A skylight 10 and a corresponding window cover 11 are provided on its upper part so that the model plug-in 4 can be installed on the motion module 3 through the skylight 10. The shell 5 is made of a material that can be used for CT imaging and magnetic resonance imaging. After the motion module 3 is installed on the shell 5, the shell 5 has good sealing performance, and its interior can be filled with liquids such as water and oil. Handles 9 are provided on the upper ends of both sides of the shell 5 to facilitate the transportation of the radiotherapy quality control model. A foot seat 7 is provided at the bottom of the shell 5, and a leveling foot can be provided on the foot seat 7 to adjust the entire quality control model to a horizontal state.

[0041] In this embodiment, the motion module 3 includes a base 12, an actuating rod 16, and a mold body slot 14. The base 12 adopts a hollow long strip structure, one end or both ends of which can be installed on the mounting hole of the shell 5. The actuating rod 16 can be telescopic to change the length, one end of which is movably mounted on the base 12 through a hinge 15, and the other end is movably mounted on the mold body slot 14 through a hinge 15. The number of actuating rods installed between the mold body slot 14 and the base 12 is four, six or more. In this embodiment, the total number of actuating rods 16 is 6, and all the actuating rods 16 can be distributed on one side of the mold body slot, or the same number can be distributed on both sides of the mold body slot 14. In this embodiment, the 6 actuating rods 16 are evenly distributed on both sides of the mold body slot 14. By controlling the telescopic length of each actuating rod 16, the position and posture of the mold body slot 14 can be controlled, or the continuous multi-degree-of-freedom motion of the spatial translation and / or rotation of the mold body slot 14 can be realized.

[0042] In this embodiment, the actuator that drives the actuator rod 16 to extend and retract can be a pneumatic cylinder or a hydraulic cylinder. When a pneumatic cylinder or a hydraulic cylinder is used, a matching pressure actuator 6, such as an air pump or a hydraulic pump, and a matching pressure pipe 2 are used to transmit pressure to the actuator rod 16, and the pneumatic force or hydraulic pressure is transmitted to the actuator rod 16, driving the actuator rod 16 to perform extension and retraction movements.

[0043] The phantom slot 14 is a hollow structure, made of a material that can be used for both CT imaging and magnetic resonance imaging, and the phantom plug-in 4 can be tightly placed inside it. There is a cable groove 13 on the side wall to facilitate the cable of the pen-shaped ionization chamber to pass through. In this embodiment, the motion controller 1 is connected to the actuator of the actuating rod 16 (in this embodiment, the actuating rod 16 is a cylinder or a hydraulic cylinder) through the pressure tube 2, and each actuating rod 16 can be controlled to perform telescopic movement according to the set control instruction, so as to realize the posture control of the phantom plug-in 4 or the continuous spatial multi-degree-of-freedom movement.

[0044] In this embodiment, the phantom plug-in 4 includes a series of components, all of which are made of materials that can be used for CT imaging and magnetic resonance imaging. The shape of the components is adapted to the notch of the phantom slot. A spherical or ellipsoidal core module 17 is embedded in each component, and at least one core module 17 is arranged with a marking point 19 for verifying the accuracy of multimodal imaging fusion. In this embodiment, one of the components is an integrated type, and a finger-shaped ionization chamber mounting hole 18 is provided on it. The end of the ionization chamber mounting hole 18 should pass through the center of the core module 17. One of the components is a split type, and a film slot for placing a film on its internal cross section, horizontal surface and / or vertical surface. According to different quality control items, different phantom plug-ins can be selected to be placed in the phantom slot. For example, in order to verify the accuracy of image fusion, a phantom plug-in with marking points on the core module can be selected. In order to verify the accuracy of target area delineation, the selected phantom plug-in should have a core module with a certain geometric shape and volume. In order to measure the center point dose of the phantom plug-in, a phantom plug-in with a finger-shaped ionization chamber mounting hole should be selected.

[0045] Example 2

[0046] like Figures 1 to 3 , Figure 5 As shown, in this embodiment, a radiotherapy quality control phantom is provided, including: a shell 5, a motion module 3, a phantom plug-in 4, and a motion controller 1, wherein the motion module 3 is installed in the shell 5, and the phantom plug-in 4 is detachably installed on the motion module 3.

[0047] like Figure 2 As shown, the shell 5 is a hollow structure, and a supporting hole 8 for installing the motion module is provided on the side. A skylight 10 and a corresponding window cover 11 are provided on the upper part, so that the model plug-in 4 can be installed on the motion module 3 through the skylight 10. The shell 5 is made of a material that can be used for CT imaging and magnetic resonance imaging. After the motion module 3 is installed on the shell 5, the shell 5 has good sealing performance, and the interior of the shell 5 can be filled with liquids such as water and oil. Handles 9 are provided on the upper ends of both sides of the shell 5 to facilitate the transportation of the radiotherapy quality control model. A foot seat 7 is provided at the bottom of the shell 5, and a leveling foot can be provided on the foot seat 7 to adjust the level of the entire quality control model.

[0048] like Figure 3As shown, the motion module 3 includes a base 12, an actuating rod 16, and a phantom slot 14. The base 12 adopts a hollow long strip structure, one or both ends of which can be installed on the mounting hole (support hole 8) of the housing 5. The actuating rod 16 can be telescopic to change the length, one end of which is installed on the base 12 through a hinge 15, and the other end is installed on the phantom slot 14 through a hinge 15. The number of actuating rods installed between the phantom slot 14 and the base 12 is four, six or more, and all the actuating rods 16 can be distributed on one side of the phantom slot 14, or the same number can be distributed on both sides of the phantom slot 14. The phantom slot 14 is a hollow structure, made of a material that can be used for both CT imaging and magnetic resonance imaging, and the phantom plug-in 4 can be tightly placed inside it. There is a cable groove 13 on its side wall to facilitate the passage of the cable of the pen-shaped ionization chamber.

[0049] like Figure 1 , 3 As shown, in this embodiment, the actuator driving the actuator rod to extend and retract is a cylinder or a hydraulic cylinder, and the matching pressure actuator is an air pump or a hydraulic pump. The pressure is transmitted to the actuator rod through a pressure pipe to drive each actuator rod to perform telescopic movement. The motion controller is connected to the actuator of the actuator rod through a cable, and can control each actuator rod to perform telescopic movement according to the set control instructions, thereby realizing the posture control of the phantom plug-in or continuous spatial multi-degree-of-freedom movement.

[0050] Different from Example 1, Figure 5 As shown, the phantom plug-in in this embodiment is split and can be assembled into an outer shape that fits the notch of the phantom slot, and the film slot 20 of the internal cross section, horizontal plane and / or vertical plane can be placed on the film 21. In order to measure the surface dose of the center plane of the phantom, a split phantom plug-in is selected in this embodiment so that the dose measurement film 21 can be placed in the cross section, horizontal plane and / or vertical plane of the phantom plug-in.

[0051] Example 3

[0052] Combined with Figure 6 , Figure 4 As shown, in this embodiment, a radiotherapy quality control phantom is provided, which is different from the embodiment 1 in that Figure 6 As shown, in this embodiment, the actuator rod 16 is an electric cylinder, and the motion controller 1 is connected to the electric cylinder through a cable 22, and sends a signal to the electric cylinder through the cable 22, driving each electric cylinder to perform telescopic movement. The motion controller is connected to the actuator of the actuator rod through a cable, and can control each actuator rod to perform telescopic movement according to the set control instruction, thereby realizing the posture control of the mold body plug-in or continuous spatial multi-degree-of-freedom movement.

[0053] Example 4

[0054] Combined with Figure 6 , Figure 5As shown, in this embodiment, a radiotherapy quality control phantom is provided, which is different from embodiment 2 in that Figure 5 As shown, in this embodiment, the actuator rod 16 is an electric cylinder, and the motion controller 1 is connected to the electric cylinder through a cable 22, and sends a signal to the electric cylinder through the cable 22, driving each electric cylinder to perform telescopic movement. The motion controller is connected to the actuator of the actuator rod through a cable, and can control each actuator rod to perform telescopic movement according to the set control instruction, thereby realizing the posture control of the mold body plug-in or continuous spatial multi-degree-of-freedom movement.

[0055] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution disclosed in the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work should be included in the scope of protection of the utility model.

Claims

1. A radiotherapy quality control phantom, characterized in that: include: A housing, a motion module, a phantom plug-in, and a motion controller, wherein the motion module is installed in the housing, the phantom plug-in is detachably installed on the motion module, and the motion controller is communicatively connected to the motion module; The motion module comprises a base, an actuating rod, and a mold body slot; the mold body plug-in is inserted into the mold body slot; the base is mounted on a shell; a plurality of actuating rods are movably connected between the mold body slot and the end of the base; the motion controller is connected to the actuator of the actuating rod, and controls each actuating rod to perform telescopic motion according to the set control instructions, so as to realize the posture control or continuous spatial multi-degree-of-freedom motion of the mold body plug-in; wherein, by controlling the telescopic length of each actuating rod, the position and posture of the mold body slot can be controlled, or the continuous multi-degree-of-freedom motion of spatial translation and / or rotation of the mold body slot can be realized.

2. The radiotherapy quality control phantom according to claim 1, characterized in that: The shell is a hollow structure, with supporting holes for installing the motion module on its side, and a skylight and a corresponding window cover on its upper part, so that the mold body plug-in can be installed on the motion module through the skylight.

3. The radiotherapy quality control phantom according to claim 1 or 2, characterized in that: Handles are provided at the upper ends of both sides of the shell to facilitate the transportation of the radiotherapy quality control phantom. A footrest is provided at the bottom of the shell, and a leveling foot can be provided on the footrest to adjust the level of the entire quality control phantom.

4. The radiotherapy quality control phantom according to claim 1, characterized in that: The actuating rod is an electric cylinder; when the electric cylinder is used as the actuating rod, the electric cylinder is connected to the base and the mold body slot respectively.

5. The radiotherapy quality control phantom according to claim 1, characterized in that: The actuating rod is a pneumatic cylinder or a hydraulic cylinder. When a pneumatic cylinder or a hydraulic cylinder is used, a pressure actuator is used in conjunction with the actuating rod, and the pressure actuator is arranged in the motion controller.

6. The radiotherapy quality control phantom according to claim 5, characterized in that: The pressure actuator is an air pump or a hydraulic pump, which is connected to a pressure pipe to transmit pressure to the actuating rod, and transmits the pneumatic force or hydraulic force to the actuating rod to drive the actuating rod to perform telescopic movement.

7. The radiotherapy quality control phantom according to claim 1, characterized in that: The phantom slot is a hollow structure, made of a material that can be used for both CT imaging and magnetic resonance imaging, and a phantom plug-in can be securely placed inside it. A cable groove is provided on the side wall to facilitate the passage of the cable of the pencil-shaped ionization chamber.

8. The radiotherapy quality control phantom according to claim 1 or 7, characterized in that: The phantom plug-in is an integrated one, with a spherical or ellipsoidal core module embedded inside, and marking points are arranged on the core module for verifying the accuracy of multimodal imaging fusion; the phantom plug-in is provided with a finger-shaped ionization chamber mounting hole, and the end of the mounting hole passes through the center of the core module.

9. The radiotherapy quality control phantom according to claim 1 or 7, characterized in that: The mold body plug-in is of split type, comprising a plurality of plug-in monomers with the same structure and arranged in a matrix, and a film slot for placing films is provided between two adjacent plug-in monomers.

10. The radiotherapy quality control phantom according to claim 1, characterized in that: All the actuating rods are distributed on one side of the mold body slot, with one end connected to the mold body slot and the other end connected to the base; or, all the actuating rods are evenly distributed on both sides of the mold body slot, with one end connected to the mold body slot and the other end connected to the base.

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