Protection device for tumor radiotherapy

Abstract

The protection device comprises an arc-shaped protection plate and plane protection plates, the arc-shaped protection plate and the plane protection plates are arranged on the two sides of a detection bed, the plane protection plates are installed at the positions, close to the middle of the detection bed, of the arc-shaped protection plate, the plane protection plates on the two sides abut against each other, and adjusting mechanisms are arranged on the plane protection plates and the arc-shaped protection plate. The adjusting mechanism can change the angle between the plane protection plate and the arc-shaped protection plate, and normal human tissues are shielded and protected, so that the normal tissues are prevented from being damaged by radioactive rays. According to the protection device for tumor radiotherapy, the size of the radiotherapy window of the plane protection plate is changed through rotation of the guide rod and the limiting rod, the size of the radiotherapy window is no longer multiple of the sectional area of the plane protection plate, and the plane protection plate can be rotated according to the position needing radiotherapy, so that the radiotherapy area of normal tissues is reduced; harm of radiotherapy to normal tissues is reduced, a patient can conveniently get on and off the detection bed, operation steps are reduced, and working efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tumor radiotherapy, and in particular to a protective device for tumor radiotherapy. Background Art

[0002] Tumor radiotherapy is a local treatment method that uses radiation to treat tumors. Radiation includes α, β, γ rays produced by radioisotopes and various radiation therapy machines or accelerators, electron beams, proton beams and other particle beams, which directly kill tumor cells. In order to avoid killing normal tissue and organ cells and affecting normal organ function during radiotherapy, radiotherapy protective devices are needed to protect normal tissues and organs outside the radiotherapy site.

[0003] For example, in a tumor radiotherapy protection device with publication number CN115300813A, the flat protection plate is detachably installed between the arc protection plates above the normal part of the patient, and a radiotherapy window is left between the arc protection plates above the radiotherapy part of the patient. The arc protection plate and the flat protection plate are preferably made of radiation-blocking materials to protect the patient's normal tissues.

[0004] The above-mentioned radiotherapy protection device is used to change the size of the radiotherapy window by removing the planar protection plate. The size of the radiotherapy window is a multiple of the cross-sectional area of ​​the planar protection plate. Therefore, the radiotherapy area is a multiple of the cross-sectional area of ​​the planar protection plate, and is not the area of ​​tissue that normally requires radiotherapy. The radiotherapy area will be larger than the area of ​​abnormal tissue, causing normal tissue to be harmed by radiation. Summary of the invention

[0005] The purpose of the present invention is to provide a protective device for tumor radiotherapy to solve the problem raised in the above background technology that the radiotherapy area on the market is a multiple of the cross-sectional area of ​​the flat protective plate, which is not the tissue area that the patient normally needs radiotherapy, and the radiotherapy area will be larger than the abnormal tissue area.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a protective device for tumor radiotherapy, comprising an arc-shaped protective plate and a plane protective plate, which are arranged on both sides of a detection bed, and the arc-shaped protective plate is installed with a plane protective plate near the middle of the detection bed, and the plane protection plates on both sides are close to each other, and an adjustment mechanism is arranged on the plane protection plate and the arc-shaped protective plate, and the adjustment mechanism can change the angle between the plane protection plate and the arc-shaped protective plate to shield and protect normal human tissue to prevent the normal tissue from being harmed by radiation.

[0007] Preferably, both sides of the detection bed are rotatably connected with operating rods, a plurality of arc-shaped protection plates penetrate the operating rods, and limit plates are installed on both sides of the detection bed.

[0008] Preferably, the limit plate is located obliquely below the arc-shaped protection plate, and the limit plate keeps the arc-shaped protection plate horizontal. The arc-shaped protection plate and the plane protection plate are both made of transparent lead plate.

[0009] Preferably, the adjustment mechanism comprises a limit rod, a guide rod, a groove and a limit slot, the limit rod is installed on both sides of the detection bed, the bottom of the plane protection plate is provided with a limit slot, and one end of the plane protection plate close to the arc protection plate is provided with a groove;

[0010] A limiting rod is inserted in the limiting groove, and a guide rod is inserted in the groove.

[0011] Preferably, the length of the guide rod is equal to the width of the plane protection plate, the cross-sectional diameter of the guide rod is larger than the diameter of the groove cross-sectional opening, the diameter of the limit groove cross-sectional opening is smaller than the cross-sectional diameter of the limit rod, and the guide rod and the limit rod are both made of rubber.

[0012] Preferably, a push rod is installed on one side of the guide rod away from the flat protection plate, and a support spring is arranged between the other end of the push rod and the arc-shaped protection plate;

[0013] A blocking rod is slidably arranged inside the arc-shaped protection plate, and a connecting spring is installed between the blocking rod and the arc-shaped protection plate;

[0014] A pulling rod is slidably arranged inside the arc-shaped protection plate, and a return spring is arranged between the pulling rod and the arc-shaped protection plate.

[0015] Preferably, the upper end of the push rod protrudes from the upper end of the arc-shaped protective plate, the baffle rod is arranged in an "L"-shaped structure, and the side of the baffle rod close to the push rod is inclined, the two ends of the pull rod are flush with the side edges of the arc-shaped protective plate, the middle position of the pull rod is concave downward, and the baffle rod passes through the concave position of the pull rod.

[0016] Preferably, moving rods are slidably connected to both sides of the detection bed, the moving rods slide on the outside of the operating rods, a threaded rod is rotatably connected to the operating rods, and the ends of the threaded rods are threadedly connected to the moving rods;

[0017] A mounting rod is installed on the moving rod, and a plurality of fixing columns are installed on one side of the mounting rod close to the plane protection plate, and the fixing columns correspond to the plane protection plates one by one.

[0018] Preferably, the moving rod is a non-circular structure, the fixed column is a conical structure, the fixed column and the push rod push each other, and the moving distance of the fixed column is greater than the distance from the fixed column to the push rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention is provided with a guide rod, a limit rod, a groove and a limit groove. The guide rod is inserted into the interior of the groove, and the limit rod is inserted into the interior of the limit groove. The guide rod and the limit rod limit the flat protection plate, so that the flat protection plate rotates around the guide rod and the limit rod. The size of the radiotherapy window of the flat protection plate is changed by rotating the guide rod and the limit rod. The size of the radiotherapy window is no longer a multiple of the cross-sectional area of ​​the flat protection plate. The flat protection plate can be rotated according to the position where radiotherapy is required, thereby reducing the area of ​​normal tissue being radiotherapyed, thereby reducing the damage caused by radiotherapy to normal tissue.

[0021] 2. The present invention is provided with a movable rod, a mounting rod and a fixed column. The movement of the movable rod drives the mounting rod and the fixed column to move synchronously. The fixed column causes the push rod to move toward the side close to the plane protection plate, so that all the push rods and the guide rods move into the groove, so that the plane protection plate rotates synchronously with the arc protection plate, which is convenient for patients to get on and off the testing bed. There is no need for personnel to operate each arc protection plate and the plane protection plate, which reduces the operation steps and greatly improves work efficiency.

[0022] 3. The present invention is provided with a pulling rod and a pushing rod. When the plane protection plate needs to be rotated around the guide rod, the position of the guide rod can be changed by operating the corresponding pushing rod. When the rotation point of the plane protection plate needs to be changed, the guide rod needs to be reset. The guide rod is automatically reset by pushing the pulling rod. There is no need to operate each pushing rod, thereby reducing the number of operating steps. The installation rod is interrelated with the above-mentioned movement. Movement of the installation rod can move all the pushing rods, thereby changing the rotation point of the plane protection plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a side view structural schematic diagram of the present invention;

[0025] Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the pull rod of the present invention;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the arc protection plate of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure after the limit rod of the present invention moves.

[0029] In the figure: 1. detection bed; 2. limit plate; 3. operating rod; 4. threaded rod; 5. moving rod; 6. mounting rod; 7. fixing column; 8. limit rod; 9. arc protection plate; 10. guide rod; 11. reset spring; 12. plane protection plate; 13. groove; 14. limit slot; 15. pulling rod; 16. stop rod; 17. support spring; 18. push rod; 19. connecting spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 6 , the present invention provides a technical solution:

[0032] A protective device for tumor radiotherapy comprises an arc protection plate 9 and a plane protection plate 12, which are arranged on both sides of a detection bed 1. The arc protection plate 9 is installed with a plane protection plate 12 near the middle position of the detection bed 1, and the plane protection plates 12 on both sides are close to each other. Both sides of the detection bed 1 are rotatably connected with an operating rod 3, and a plurality of arc protection plates 9 are passed through the operating rod 3. Limit plates 2 are installed on both sides of the detection bed 1, and the limit plates 2 are located obliquely below the arc protection plate 9. The limit plates 2 keep the arc protection plate 9 horizontal. The arc protection plate 9 and the plane protection plate 12 are both made of transparent lead plates.

[0033] During radiotherapy, the patient lies on the detection bed 1, and the arc-shaped protective plate 9 and the plane protective plate 12 cover the patient. The arc-shaped protective plate 9 and the plane protective plate 12 can absorb radiation to prevent the radiation from irradiating the patient and avoiding radiation to the corresponding position of the patient's normal tissue, thereby protecting the normal tissue. The plane protective plate 12 is adjusted according to the position of the tumor that needs radiotherapy.

[0034] The plane protection plate 12 and the arc protection plate 9 are provided with an adjustment mechanism, which can change the angle of the plane protection plate 12 and the arc protection plate 9, shield and protect normal human tissues, so as to prevent normal tissues from being harmed by radiation. The adjustment mechanism includes a limit rod 8, a guide rod 10, a groove 13 and a limit groove 14. The limit rod 8 is installed on both sides of the detection bed 1. The bottom of the plane protection plate 12 is provided with a limit groove 14, and the end of the plane protection plate 12 close to the arc protection plate 9 is provided with a groove 13; the limit rod 8 is inserted into the limit groove 14, and the guide rod 10 is inserted into the groove 13. The length of the guide rod 10 is equal to the width of the plane protection plate 12, the cross-sectional diameter of the guide rod 10 is greater than the diameter of the cross-sectional opening of the groove 13, and the cross-sectional opening of the limit groove 14 is smaller than the cross-sectional diameter of the limit rod 8. The guide rod 10 and the limit rod 8 are both made of rubber.

[0035] When the arc-shaped protection plate 9 and the plane protection plate 12 are located above the patient, push the plane protection plate 12 downward by hand. The plane protection plate 12 moves downward, driving the limiting groove 14 to move downward. The limiting groove 14 moves downward to squeeze the limiting rod 8, so that the limiting rod 8 is deformed and then engaged in the limiting groove 14. The plane protection plate 12 is limited by the setting of the limiting groove 14. The friction between the limiting groove 14 and the limiting rod 8 is greater than the gravity of the plane protection plate 12. The plane protection plate 12 is kept horizontal by friction. When the position requiring radiotherapy is located on both sides of the plane protection plate 12, push the corresponding plane protection plate 12 by hand. The plane protection plate 12 rotates around the limiting rod 8. The size of the radiotherapy window is controlled by controlling the angle at which the plane protection plate 12 is pushed.

[0036] When the position requiring radiotherapy is located in the middle of the plane protection plate 12, the corresponding push rod 18 is pushed by hand, and the push rod 18 moves toward the side close to the guide rod 10. The movement of the push rod 18 drives the guide rod 10 to the middle position synchronously. During the movement of the guide rod 10, the groove 13 is squeezed, and the groove 13 squeezes the guide rod 10, so that the guide rod 10 is deformed and engaged inside the groove 13. When the push rod 18 is pushed to contact the blocking rod 16, since the end of the blocking rod 16 close to the push rod 18 is set as an inclined structure, the push rod 18 pushes the blocking rod 16 to move away from the push rod 18. When the push rod 18 moves to a distance separated from the blocking rod 16, the elastic force of the connecting spring 19 causes the blocking rod 16 to move toward the side close to the push rod 18. When the push rod 18 is pushed to a point where it can no longer be pushed, the hand is released, and the push rod 18 fits against the blocking rod 16. The blocking rod 16 limits the push rod 18 to prevent the push rod 18 from returning to its original position. The friction force between the groove 13 and the guide rod 10 is greater than the gravity of the plane protection plate 12. Then, the plane protection plate 12 is moved upward by hand, and the plane protection plate 12 rotates upward around the guide rod 10. During the upward rotation of the plane protection plate 12, the limit groove 14 separates from the limit rod 8.

[0037] A pulling rod 15 slides inside the arc-shaped protective plate 9, and a reset spring 11 is arranged between the pulling rod 15 and the arc-shaped protective plate 9. A push rod 18 is installed on the side of the guide rod 10 away from the flat protective plate 12, and a supporting spring 17 is arranged between the other end of the push rod 18 and the arc-shaped protective plate 9; a baffle rod 16 slides inside the arc-shaped protective plate 9, and a connecting spring 19 is installed between the baffle rod 16 and the arc-shaped protective plate 9; the upper end of the push rod 18 protrudes from the upper end of the arc-shaped protective plate 9, the baffle rod 16 is arranged in an "L"-shaped structure, and the side of the baffle rod 16 close to the push rod 18 is inclined, the two ends of the pulling rod 15 are flush with the side edges of the arc-shaped protective plate 9, the middle position of the pulling rod 15 is concave downward, the baffle rod 16 passes through the concave position of the pulling rod 15, and the elastic force of the supporting spring 17 is greater than the clamping force between the guide rod 10 and the groove 13.

[0038] After radiotherapy is completed, push the pulling rod 15 at the end by hand, and the pulling rod 15 at the end moves to move multiple pulling rods 15. The pulling rod 15 moves to the right and gradually separates from the pushing rod 18. After complete separation, the supporting spring 17 pulls the pushing rod 18 and the guide rod 10. The elastic force of the supporting spring 17 separates the guide rod 10 from the groove 13. When the pushing rod 18 returns to its original position, release the hand pushing the pulling rod 15. The elastic force of the reset spring 11 resets the pulling rod 15 to its original position. The setting of the pulling rod 15 resets several guide rods 10, and the pulling rod 15 will not affect the normal rotation of the arc protection plate 9.

[0039] The two sides of the detection bed 1 are slidably connected with moving rods 5, which slide on the outside of the operating rod 3. The operating rod 3 is rotatably connected with a threaded rod 4, and the end of the threaded rod 4 is threadedly connected with the moving rod 5; the moving rod 5 is installed with a mounting rod 6, and a plurality of fixed columns 7 are installed on the side of the mounting rod 6 close to the plane protection plate 12, and the fixed columns 7 correspond to the plane protection plate 12 one by one. The moving rod 5 is a non-circular structure, and the fixed column 7 is a conical structure. The fixed column 7 is pushed by the push rod 18, and the moving distance of the fixed column 7 is greater than the distance from the fixed column 7 to the push rod 18.

[0040] When radiotherapy is completed, the patient needs to get off the detection bed 1. The arc-shaped protection plate 9 and the plane protection plate 12 will affect the patient's normal getting on and off the detection bed 1. The threaded rod 4 is rotated by hand. The rotation of the threaded rod 4 causes the moving rod 5 to move toward the side close to the arc-shaped protection plate 9. During the movement of the moving rod 5, the mounting rod 6 is driven to move synchronously. During the movement of the mounting rod 6, the fixing column 7 is driven to move synchronously. When the fixing column 7 moves to contact with the push rod 18, due to the structure of the fixing column 7, the push rod 18 moves toward the plane protection plate 12. When the moving rod 5 moves to separate from the detection bed 1, the guide rod 10 just moves to the inside of the groove 13 to achieve the connection with the plane protection plate 12. Then, the operating rod 3 is rotated by hand. The rotation of the operating rod 3 drives the threaded rod 4 to rotate synchronously. The rotation of the operating rod 3 causes the arc-shaped protection plate 9 and the plane protection plate 12 to rotate synchronously outward, so that the arc-shaped protection plate 9 and the plane protection plate 12 rotate to the side to prevent the arc-shaped protection plate 9 and the plane protection plate 12 from affecting the patient getting on and off the detection bed 1.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 protective device for tumor radiotherapy, characterized in that: The invention comprises an arc-shaped protection plate (9) and a plane protection plate (12), which are arranged on both sides of a detection bed (1); the arc-shaped protection plate (9) is provided with a plane protection plate (12) near the middle of the detection bed (1); the plane protection plates (12) on both sides are close to each other; an adjustment mechanism is arranged on the plane protection plate (12) and the arc-shaped protection plate (9); the adjustment mechanism can change the angle between the plane protection plate (12) and the arc-shaped protection plate (9), thereby shielding and protecting normal human tissues, thereby preventing the normal tissues from being harmed by radiation.

2. A protective device for tumor radiotherapy according to claim 1, characterized in that: Both sides of the detection bed (1) are rotatably connected to operating rods (3), a plurality of arc-shaped protection plates (9) are passed through the operating rods (3), and limit plates (2) are installed on both sides of the detection bed (1).

3. A protective device for tumor radiotherapy according to claim 2, characterized in that: The limit plate (2) is located obliquely below the arc-shaped protection plate (9), and the limit plate (2) keeps the arc-shaped protection plate (9) horizontal. The arc-shaped protection plate (9) and the plane protection plate (12) are both made of transparent lead plates.

4. The protective device for tumor radiotherapy according to claim 1, characterized in that: The adjustment mechanism comprises a limiting rod (8), a guide rod (10), a groove (13) and a limiting groove (14); the limiting rod (8) is installed on both sides of the detection bed (1); the limiting groove (14) is provided at the bottom of the plane protection plate (12); and the groove (13) is provided at one end of the plane protection plate (12) close to the arc protection plate (9); A limiting rod (8) is inserted into the limiting groove (14), and a guide rod (10) is inserted into the groove (13).

5. A protective device for tumor radiotherapy according to claim 4, characterized in that: The length of the guide rod (10) is equal to the width of the plane protection plate (12), the cross-sectional diameter of the guide rod (10) is larger than the diameter of the cross-sectional opening of the groove (13), the cross-sectional opening diameter of the limiting groove (14) is smaller than the cross-sectional diameter of the limiting rod (8), and the guide rod (10) and the limiting rod (8) are both made of rubber.

6. A protective device for tumor radiotherapy according to claim 5, characterized in that: A push rod (18) is installed on the side of the guide rod (10) away from the plane protection plate (12), and a support spring (17) is arranged between the other end of the push rod (18) and the arc-shaped protection plate (9); A blocking rod (16) is slidably disposed inside the arc-shaped protection plate (9), and a connecting spring (19) is installed between the blocking rod (16) and the arc-shaped protection plate (9); A pulling rod (15) is slidably arranged inside the arc-shaped protection plate (9), and a return spring (11) is arranged between the pulling rod (15) and the arc-shaped protection plate (9).

7. A protective device for tumor radiotherapy according to claim 6, characterized in that: The upper end of the push rod (18) protrudes from the upper end of the arc-shaped protective plate (9), the blocking rod (16) is arranged in an "L"-shaped structure, and the side of the blocking rod (16) close to the push rod (18) is inclined, the two ends of the pulling rod (15) are flush with the side of the arc-shaped protective plate (9), the middle position of the pulling rod (15) is concave downward, and the blocking rod (16) passes through the concave position of the pulling rod (15).

8. The protective device for tumor radiotherapy according to claim 1, characterized in that: The two sides of the detection bed (1) are slidably connected with moving rods (5), the moving rods (5) slide on the outside of the operating rods (3), the operating rods (3) are rotatably connected with threaded rods (4), and the ends of the threaded rods (4) are threadedly connected with the moving rods (5); A mounting rod (6) is mounted on the moving rod (5), and a plurality of fixing columns (7) are mounted on a side of the mounting rod (6) close to the plane protection plate (12), wherein the fixing columns (7) correspond to the plane protection plate (12) one by one.

9. A protective device for tumor radiotherapy according to claim 8, characterized in that: The moving rod (5) is a non-circular structure, the fixed column (7) is a conical structure, the fixed column (7) and the push rod (18) push each other, and the moving distance of the fixed column (7) is greater than the distance from the fixed column (7) to the push rod (18).

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