Patient body displacement detection device in thoracic and abdominal tumor radiotherapy process

Abstract

The invention relates to the technical field of medical instruments, in particular to a patient body displacement detection device in the thoracic and abdominal tumor radiotherapy process, which comprises a medical bed and a fixed base, the fixed base is mounted at the rear end of the medical bed, a driving mechanism is arranged in the fixed base, and two groups of adjusting mechanisms are symmetrically arranged on the driving mechanism. Three-dimensional laser scanners are installed on the two sets of adjusting mechanisms respectively, the outer ends of the three-dimensional laser scanners are connected with connecting lines, and the other ends of the connecting lines are connected with host processing equipment. According to the invention, through the arrangement of the driving mechanism, the radiotherapy process can be positioned in an omnibearing and multi-angle manner, the control precision is high, and the stability degree is high; according to the structural design of double three-dimensional laser scanners, a three-dimensional monitoring network is constructed through a scanning imaging method, position verification and monitoring are carried out on a patient needing radiotherapy, displacement of a chest and abdomen body surface mark point is captured in real time, and radiotherapy equipment is automatically suspended when an alarm threshold value is triggered.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and specifically to a device for detecting the body displacement of a patient during the radiotherapy of chest and abdominal tumors. Background Art

[0002] Radiotherapy, together with surgery and chemotherapy, has become a major means of tumor treatment. In recent years, with the rapid development of computer technology, medical imaging technology, radiation physics, and radiation biology, radiotherapy has evolved from the initial conventional radiotherapy to the current precise radiotherapy technology mainly based on three-dimensional conformal radiotherapy and intensity-modulated radiotherapy. Precise radiotherapy technology can effectively increase the treatment gain ratio, but at the same time puts forward higher requirements for the accuracy of the patient's body position. Static intensity-modulated radiotherapy technology can increase the uniformity and conformity of the dose distribution in the tumor target area of the patient, improve the target area dose, reduce the complications of late severe radiation injury, and improve the quality of life. However, the total number of monitor units (MU) of this technology is more than that of the conventional radiotherapy irradiation technology, which makes the treatment time of the patient longer and prone to problems such as body position changes during the treatment process, resulting in a decrease in treatment accuracy.

[0003] The movement of tumors in various links from simulation positioning, treatment planning design to irradiation will affect the accuracy of the target area position and dose. Domestic and foreign research has shown that when the isocenter of the tumor target area moves 2-3 mm in each of the three-dimensional directions, the dose deviation of the tumor target area irradiation can reach 20% - 30%. The ICRU Report No. 24 points out that when the dose deviation of the tumor target area is 5%, there may be a risk of out-of-control of the primary focus or an increase in complications.

[0004] However, during the period from the start to the end of the treatment when the radiotherapy therapist operates the medical linear accelerator, it is impossible to ensure that the patient's body does not move, so that the treatment is always carried out in the correct body position. Especially in the case of a long treatment time, the body position repeatability of some patients is poor, or due to other reasons, the patient's body movement generates a certain displacement, resulting in insufficient target area dose or excessive irradiation of surrounding normal tissues. Therefore, we propose a device for detecting the body displacement of a patient during the radiotherapy of chest and abdominal tumors to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for detecting the body displacement of a patient during the radiotherapy of chest and abdominal tumors, so as to solve the problem that it is impossible to ensure that the patient's body does not move, so that the treatment is always carried out in the correct body position, resulting in insufficient target area dose or excessive irradiation of surrounding normal tissues as mentioned in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: a body displacement detection device for patients during radiotherapy of chest and abdominal tumors, including a medical bed and a fixed base. The fixed base is installed at the rear end of the medical bed. A driving mechanism is arranged inside the fixed base. Two groups of adjusting mechanisms are symmetrically arranged on the driving mechanism. Three-dimensional laser scanners are respectively installed on the two groups of adjusting mechanisms. A connecting line is connected to the outer end of the three-dimensional laser scanner, and the other end of the connecting line is connected to the host processing device, which is located on the right side of the medical bed;

[0007] The driving mechanism includes a servo motor, a driving gear, an adjusting ring, a driven gear and an auxiliary component. The servo motor is fixedly installed inside the fixed base. The driving gear is fixedly connected to the front end of the servo motor. The adjusting ring is rotatably connected to the front end of the fixed base. The driven gear is fixedly connected to the inside of the adjusting ring. Four groups of auxiliary components are arranged on the outer surface of the adjusting ring. The driving gear meshes with the driven gear;

[0008] The adjusting mechanism includes a height adjusting component and an angle adjusting component. The three-dimensional laser scanner is installed on the angle adjusting component;

[0009] A fixing mechanism is arranged on the surface of the medical bed. The fixing mechanism includes a leg positioning component, a positioning bracket and an abdominal positioning component. A fixing component is arranged outside the fixing mechanism.

[0010] Preferably, the height adjusting component includes a first fixing frame, a first adjusting rod, a fixing disc, a handle, a movable plate and a guide rod. The front side surface of the adjusting ring is fixedly connected with the first fixing frame. The first adjusting rod is rotatably connected inside the first fixing frame. The upper end of the first adjusting rod is fixedly connected with the fixing disc. The handle is fixedly connected to the upper end edge of the fixing disc. The outer surface of the first adjusting rod is movably connected with the movable plate. Two groups of guide rods are symmetrically installed inside the first fixing frame with the first adjusting rod as the center. A hole adapted to the guide rod is opened in the movable plate. The angle adjusting component is installed on the front side of the movable plate.

[0011] Preferably, the angle adjusting component includes a second fixing frame, a first movable groove, a connecting rod, a ball head, a movable tube and a second adjusting rod. The front end of the movable plate is fixedly connected with the second fixing frame. The first movable groove is opened inside the second fixing frame. The connecting rod is fixedly connected to the rear end of the three-dimensional laser scanner. The ball head is fixedly connected to the rear end of the connecting rod. Two groups of second adjusting rods are symmetrically arranged up and down with the ball head as the center inside the first movable groove. The inner ends of the two groups of second adjusting rods are movably connected with the movable tube. A clamping groove adapted to the ball head is opened inside the movable tube.

[0012] Preferably, the leg positioning assembly includes a fixing plate, a positioning plate and a limiting plate. A fixing plate is arranged at the front side position of the surface of the medical bed. The positioning plate is placed inside the fixing plate, and a limiting plate is arranged at the rear side of the fixing plate. Two groups of clamping grooves are formed inside both the positioning plate and the limiting plate.

[0013] Preferably, three groups of positioning brackets are arranged on the surface of the medical bed. The positioning bracket includes a third fixing bracket, a movable rod, an adjusting knob and a hand positioning rod. Three pairs of third fixing brackets are arranged on the surface of the medical bed. The movable rod is movably connected inside the third fixing bracket. The adjusting knob is threadedly connected to the outer side of the third fixing bracket. The hand positioning rod is fixedly installed on the last group of the movable rods. The limiting plate is placed inside the first group of the third fixing brackets.

[0014] Preferably, an abdominal positioning assembly is arranged inside the second group of the movable rods. The abdominal positioning assembly includes a fixing ring, a third adjusting rod and a limiting block. The third adjusting rod is fixedly connected to the central position of the second group of the movable rods. The third adjusting rod is threadedly connected inside the third adjusting rod. The limiting block is installed at the bottom of the third adjusting rod.

[0015] Preferably, two groups of air bags are installed inside the first rotating hand positioning rod. The outer ends of the air bags are connected with connecting pipes. The air bags are located directly above the clamping grooves of the limiting plate.

[0016] Preferably, the fixing assembly includes a sliding groove, a connecting block, a fixing knob, a sliding block and a positioning ring. Two groups of sliding grooves are formed on both sides of the surface of the medical bed. Both sides of the fixing mechanism are fixedly connected with connecting blocks. The sliding block is movably connected inside the sliding groove. The upper end of the sliding block is rotatably connected with the fixing knob. The fixing knob passes through the connecting block and is movably connected with the positioning ring inside the sliding groove.

[0017] Preferably, the auxiliary assembly includes a fixing block, a communicating groove, a ball and a protective washer. Four groups of fixing blocks are fixedly connected to the outer surface of the adjusting ring. The four groups of fixing blocks are paired in two. A communicating groove is formed inside the fixing block. Six groups of balls are installed at both open ends of the communicating groove. A protective washer is fixedly connected to the surface of the open end of the communicating groove.

[0018] Preferably, gaskets are placed at the bottoms of the positioning plate and the limiting plate. The diameter of the gasket is adapted to the inner diameter of the third fixing bracket.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. Through the setting of the driving mechanism, the present invention drives the adjusting ring to realize the rotation of the three-dimensional laser scanner along the central position, enabling all-round and multi-angle positioning of the radiotherapy process, with relatively high control precision and stability. The structural design of the dual three-dimensional laser scanners constructs a three-dimensional monitoring network through the scanning imaging method to verify and monitor the position of patients requiring radiotherapy, and to capture the displacement of the body surface marking points on the chest and abdomen in real time, automatically pausing the radiotherapy equipment when the alarm threshold is triggered.

[0021] 2. Through the setting of the fixing mechanism, the present invention can limit the forward and backward movement of the patient, facilitating the timely adjustment of the patient's body position to the correct position, ensuring the accuracy of tumor treatment during the implementation of current high-dose radiotherapy, reducing the dose deviation caused by the body position movement of the patient, and reducing the damage to surrounding normal tissues while ensuring the tumor dose; moreover, this device is applicable to patients of different body types, with wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a front view schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a front elevation schematic diagram of the structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure at the driving mechanism of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure at the adjusting component of the present invention;

[0027] Figure 5 For the present invention Figure 4 It is a left view structural schematic diagram at the height adjusting component in the present invention;

[0028] Figure 6 It is a schematic diagram of the structure at the fixing mechanism of the present invention;

[0029] Figure 7 For the present invention Figure 5 It is a partial enlarged schematic diagram of A in the present invention;

[0030] Figure 8 For the present invention Figure 6 It is a partial enlarged schematic diagram of B in the present invention;

[0031] Figure 9For the present invention Figure 3 Schematic structural diagram of the positioning component in the present invention

[0032] In the figure: 1, medical bed; 2, fixed base; 3, drive mechanism; 31, servo motor; 32, driving gear; 33, adjusting ring; 34, driven gear; 35, auxiliary component; 351, fixed block; 352, communication groove; 353, ball; 354, protective washer; 4, adjusting mechanism; 41, height adjusting component; 411, first fixing frame; 412, first adjusting rod; 413, fixed disk; 414, grip; 415, movable plate; 416, guide rod; 42, angle adjusting component; 421, second fixing frame; 422, first movable groove; 423, connecting rod; 424, ball head; 425, movable tube; 426, second adjusting rod; 5, three-dimensional laser scanner; 6, connecting wire; 7, host processing device; 8, fixing mechanism; 81, leg positioning component; 811, fixing plate; 812, positioning plate; 813, limiting plate; 814, connecting tube; 815, airbag; 82, positioning bracket; 821, third fixing frame; 822, movable rod; 823, adjusting knob; 824, hand positioning rod; 83, abdomen positioning component; 831, fixing ring; 832, third adjusting rod; 833, limiting block; 9, fixing component; 91, sliding groove; 92, connecting block; 93, fixing knob; 94, sliding block; 95, positioning ring; 10, gasket. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1-9, an embodiment provided by the present invention: a device for detecting the body displacement of a patient during radiotherapy for chest and abdominal tumors, including a medical bed 1 and a fixed base 2. The fixed base 2 is installed at the rear end of the medical bed 1. A driving mechanism 3 is arranged inside the fixed base 2. Two sets of adjusting mechanisms 4 are symmetrically arranged on the driving mechanism 3. Three-dimensional laser scanners 5 are respectively installed on the two sets of adjusting mechanisms 4. A connecting line 6 is connected to the outer end of the three-dimensional laser scanner 5, and the other end of the connecting line 6 is connected to the host processing device 7. The host processing device 7 is located on the right side of the medical bed 1; the driving mechanism 3 includes a servo motor 31, a driving gear 32, an adjusting ring 33, a driven gear 34 and an auxiliary component 35. The servo motor 31 is fixedly installed inside the fixed base 2. The front end of the servo motor 31 is fixedly connected to the driving gear 32. The front end of the fixed base 2 is rotatably connected to the adjusting ring 33. The driven gear 34 is fixedly connected inside the adjusting ring 33. Four sets of auxiliary components 35 are arranged on the outer surface of the adjusting ring 33. The driving gear 32 meshes with the driven gear 34; the adjusting mechanism 4 includes a height adjusting component 41 and an angle adjusting component 42. The three-dimensional laser scanner 5 is installed on the angle adjusting component 42; a fixing mechanism 8 is arranged on the surface of the medical bed 1. The fixing mechanism 8 includes a leg positioning component 81, a positioning bracket 82 and an abdominal positioning component 83. A fixing component 9 is arranged outside the fixing mechanism 8; when the servo motor 31 is started to drive the driving gear 32 to rotate, through the meshing of the driving gear 32 and the driven gear 34, the driven gear 34 and the adjusting ring 33 rotate, so that the three-dimensional laser scanner 5 on the adjusting ring 33 rotates along the central position to scan the contour of the patient on the medical bed 1, construct a three-dimensional monitoring network, and capture the displacement of the body surface marking points on the chest and abdomen in real time. When the patient triggers the alarm threshold, the radiotherapy equipment will be automatically paused.

[0035] Through the settings of the driving mechanism 3 and the fixing mechanism 8, this device solves the problem that it is impossible to ensure that the patient's body does not move, so that the treatment is always carried out in the correct position, resulting in insufficient target area dose or excessive irradiation of more surrounding normal tissues.

[0036] Further, the height adjusting component 41 includes a first fixing frame 411, a first adjusting rod 412, a fixing disk 413, a handle 414, a movable plate 415 and a guide rod 416. The front surface of the adjusting ring 33 is fixedly connected to the first fixing frame 411. The first adjusting rod 412 is rotatably connected inside the first fixing frame 411. The upper end of the first adjusting rod 412 is fixedly connected to the fixing disk 413. The handle 414 is fixedly connected to the upper edge of the fixing disk 413. The movable plate 415 is movably connected to the outer surface of the first adjusting rod 412. Two sets of guide rods 416 are symmetrically installed inside the first fixing frame 411 with the first adjusting rod 412 as the center. Through holes adapted to the guide rods 416 are opened in the movable plate 415. The angle adjusting component 42 is installed on the front side of the movable plate 415. As Figure 4As shown, this structure is used to drive the first adjusting rod 412 to rotate by holding the grip 414 and turning the fixed disk 413, so that the movable plate 415 on the surface of the first adjusting rod 412 moves up and down along the guide rod 416, thereby adjusting the positional relationship between the three-dimensional laser scanner 5 and the patient.

[0037] Furthermore, the angle adjusting component 42 includes a second fixing frame 421, a first movable slot 422, a connecting rod 423, a ball head 424, a movable tube 425 and a second adjusting rod 426. The front end of the movable plate 415 is fixedly connected to the second fixing frame 421. A first movable slot 422 is opened inside the second fixing frame 421. The first movable slot 422 is T-shaped. The rear end of the three-dimensional laser scanner 5 is fixedly connected to the connecting rod 423. The rear end of the connecting rod 423 is fixedly connected to the ball head 424. Two groups of second adjusting rods 426 are symmetrically arranged up and down around the ball head 424 in the first movable slot 422. The inner ends of the two groups of second adjusting rods 426 are movably connected to the movable tube 425. A card slot adapted to the ball head 424 is opened inside the movable tube 425. The inner wall of the card slot is provided with a rubber pad and engraved with anti-slip lines of two millimeters. As Figure 7 As shown, this structure is used to cancel the locking of the three-dimensional laser scanner 5 by rotating the two groups of second adjusting rods 426 to make the movable tube 425 separate from the surface of the ball head 424. At this time, the angle of the three-dimensional laser scanner 5 can be adjusted, and the left and right positions of the three-dimensional laser scanner 5 can also be adjusted. After adjustment, rotate the second adjusting rod 426 in the opposite direction to drive the movable tube 425 to make the movable tube 425 fit on the surface of the ball head 424 to lock the three-dimensional laser scanner 5 and prevent the three-dimensional laser scanner 5 from shifting.

[0038] Furthermore, the leg positioning component 81 includes a fixing plate 811, a positioning plate 812 and a limiting plate 813. The fixing plate 811 is arranged at the front side position on the surface of the medical bed 1. The positioning plate 812 is placed inside the fixing plate 811. The limiting plate 813 is arranged at the rear side of the fixing plate 811. Two groups of card slots are opened inside both the positioning plate 812 and the limiting plate 813. As Figure 6 As shown, this structure is used to place the feet at the card slots of the positioning plate 812 through the positioning plate 812 inside the fixing plate 811 to limit the feet. At the same time, the legs are placed inside the limiting plate 813 to limit the feet and legs respectively, improving the stability of the device.

[0039] Further, three groups of positioning brackets 82 are arranged on the surface of the medical bed 1. The positioning bracket 82 includes a third fixing bracket 821, a movable rod 822, an adjusting knob 823 and a hand positioning rod 824. Three pairs of third fixing brackets 821 are arranged on the surface of the medical bed 1. The movable rod 822 is movably connected inside the third fixing bracket 821. The adjusting knob 823 is threadedly connected to the outside of the third fixing bracket 821. The hand positioning rod 824 is fixedly installed on the last group of movable rods 822. The surface of the hand positioning rod 824 is provided with anti-slip lines. A limiting plate 813 is placed inside the first group of third fixing brackets 821. As Figure 6 shown, this structure can be fixedly adjusted according to the patient's body type by the combined use of the third fixing bracket 821, the movable rod 822 and the adjusting knob 823. After adjustment, the patient holds the hand positioning rod 824 to prevent the hand from moving during the treatment process.

[0040] Further, an abdominal positioning assembly 83 is arranged inside the second group of movable rods 822. The abdominal positioning assembly 83 includes a fixing ring 831, a third adjusting rod 832 and a limiting block 833. The third adjusting rod 832 is fixedly connected to the central position of the second group of movable rods 822. The third adjusting rod 832 is threadedly connected inside the third adjusting rod 832. The limiting block 833 is installed at the bottom of the third adjusting rod 832. The limiting block 833 is triangular, and the bottom is made of silica gel material, which conforms to ergonomics and enhances the comfort of the patient. As Figure 6 shown, this structure is used to lower the limiting block 833 to fit the patient's abdominal position by rotating the third adjusting rod 832 to limit the abdomen.

[0041] Further, two groups of air bags 815 are installed inside the first rotating hand positioning rod 824. The outer ends of the air bags 815 are connected with connecting pipes 814. The air bags 815 are located directly above the slots of the limiting plate 813. As Figure 6 shown, this structure is used to connect with the device through the connecting pipe 814. After the patient's legs are placed in the slots of the limiting plate 813, the connecting pipe 814 inflates the air bags 815 to further limit the legs.

[0042] Further, the fixing component 9 includes a chute 91, a connecting block 92, a fixing knob 93, a slider 94 and a positioning ring 95. Two groups of chutes 91 are opened on both sides of the surface of the medical bed 1. The chute 91 is in the shape of "soil", and the height of the upper part is twice that of the positioning ring 95. The chute 91 communicates with the outside for convenient disassembly. Both sides of the fixing mechanism 8 are fixedly connected with connecting blocks 92. The slider 94 is movably connected inside the chute 91. The upper end of the slider 94 is rotatably connected with the fixing knob 93. The fixing knob 93 passes through the connecting block 92 and is movably connected with the positioning ring 95 inside the chute 91. The upper surface of the positioning ring 95 is provided with a rubber pad. As Figure 8As shown, this structure is used to drive the positioning ring 95 to move upward by rotating the fixing knob 93, so that the surface of the positioning ring 95 fits against the inner wall of the sliding groove 91, thereby fixing the fixing plate 811 or the third fixing bracket 821. On the contrary, rotating the fixing knob 93 causes the positioning ring 95 to move downward and disengage from the inner wall of the sliding groove 91, and the position of the fixing plate 811 or the third fixing bracket 821 is adjusted by means of the slider 94 and the positioning ring 95.

[0043] Furthermore, the auxiliary component 35 includes a fixing block 351, a communication groove 352, a ball 353 and a protective washer 354. Four groups of fixing blocks 351 are fixedly connected to the outer surface of the adjusting ring 33. The four groups of fixing blocks 351 are paired in pairs. A communication groove 352 is opened inside the fixing block 351. Six groups of balls 353 are installed at both ends of the communication groove 352. A protective washer 354 is fixedly connected to the surface of the opening of the communication groove 352. As Figure 9 shown, when the adjusting ring 33 rotates, this structure is used to drive the connecting line 6 to move along the communication groove 352, and the connecting line 6 is stably pulled in the communication groove 352 by means of the balls 353, avoiding the connecting line 6 from being disordered and complex during movement and affecting the normal use of the device.

[0044] Furthermore, a gasket 10 is placed at the bottoms of the positioning plate 812 and the limiting plate 813. The diameter of the gasket 10 is adapted to the inner diameter of the third fixing bracket 821. As Figure 6 shown, this structure is used to place the gasket 10 with a corresponding height according to the needs of the patient through the gasket 10 placed at the bottoms of the limiting plate 813 and the positioning plate 812, improving the comfort of the patient.

[0045] Working principle: When in use, as Figure 1 and Figure 8 shown, the patient lies on the medical bed 1. According to the patient's body type and needs, first rotate the fixing knob 93 to make the positioning ring 95 move downward and disengage from the inner wall of the sliding groove 91, and the position of the fixing plate 811 or the third fixing bracket 821 is adjusted by means of the slider 94 and the positioning ring 95. After adjusting to a suitable position, rotate the fixing knob 93 in the opposite direction to drive the positioning ring 95 to move upward, so that the surface of the positioning ring 95 fits against the inner wall of the sliding groove 91, thereby fixing the fixing plate 811 or the third fixing bracket 821. After fixing, place the feet at the card slot of the positioning plate 812 to limit the feet. At the same time, place the legs inside the limiting plate 813 to limit the feet and legs respectively. Connect to the device through the connecting pipe 814. After the patient's legs are placed in the card slot of the limiting plate 813, the connecting pipe 814 is used to inflate the airbag 815, thereby further limiting the legs. The patient holds the hand positioning rod 824 to prevent the hand from moving during the treatment process. Rotate the third adjusting rod 832 to make the limiting block 833 descend and fit against the patient's abdominal position to limit the abdomen. As Figure 1 andFigure 3 As shown, the servo motor 31 is started to drive the driving gear 32 to rotate, and the driving gear 32 and the driven gear 34 are meshed with each other, so that the driven gear 34 and the adjustment ring 33 rotate, and the three-dimensional laser scanner 5 on the adjustment ring 33 rotates along the center position, and the contour of the patient on the medical bed 1 is scanned, and a three-dimensional monitoring network is constructed to capture the displacement of the chest and abdomen surface marker points in real time. When the patient triggers the alarm threshold, the radiotherapy equipment is automatically paused, such as Figure 9 As shown, when the adjusting ring 33 rotates, the connecting wire 6 is driven to move along the connecting groove 352, so as to avoid the connecting wire 6 being disordered and complicated when moving;

[0046] like Figure 4 and Figure 7 As shown, when the angle of the three-dimensional laser scanner 5 needs to be adjusted, the two sets of second adjustment rods 426 are rotated to make the movable tube 425 separate from the surface of the ball head 424, and the lock of the three-dimensional laser scanner 5 is canceled. At this time, the angle of the three-dimensional laser scanner 5 can be adjusted, and the left and right positions of the three-dimensional laser scanner 5 can also be adjusted. After the adjustment, the second adjustment rods 426 are rotated in the opposite direction to drive the movable tube 425 so that the movable tube 425 fits on the surface of the ball head 424, and the three-dimensional laser scanner 5 is locked to avoid displacement of the three-dimensional laser scanner 5. The two sets of second adjustment rods 426 are rotated to make the movable tube 425 separate from the surface of the ball head 424, and the lock of the three-dimensional laser scanner 5 is canceled. At this time, the angle of the three-dimensional laser scanner 5 can be adjusted, and the left and right positions of the three-dimensional laser scanner 5 can also be adjusted. After the adjustment, the second adjustment rods 426 are rotated in the opposite direction to drive the movable tube 425 so that the movable tube 425 fits on the surface of the ball head 424, and the three-dimensional laser scanner 5 is locked to avoid displacement of the three-dimensional laser scanner 5. The above is the entire working principle of the present invention.

[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A device for detecting patient body displacement during radiotherapy of thoracic and abdominal tumors, characterized in that: The medical bed (1) comprises a fixed base (2), wherein the fixed base (2) is installed at the rear end of the medical bed (1), a driving mechanism (3) is arranged inside the fixed base (2), two groups of adjustment mechanisms (4) are symmetrically arranged on the driving mechanism (3), and three-dimensional laser scanners (5) are respectively installed on the two groups of adjustment mechanisms (4), and the outer end of the three-dimensional laser scanner (5) is connected to a connecting line (6), and the other end of the connecting line (6) is connected to a host processing device (7), and the host processing device (7) is located on the right side of the medical bed (1); The driving mechanism (3) comprises a servo motor (31), a driving gear (32), an adjusting ring (33), a driven gear (34) and an auxiliary component (35); the servo motor (31) is fixedly installed inside the fixed base (2); the front end of the servo motor (31) is fixedly connected to the driving gear (32); the front end of the fixed base (2) is rotatably connected to the adjusting ring (33); the interior of the adjusting ring (33) is fixedly connected to the driven gear (34); four groups of auxiliary components (35) are arranged on the outer surface of the adjusting ring (33); the driving gear (32) and the driven gear (34) are meshed with each other; The adjustment mechanism (4) comprises a height adjustment component (41) and an angle adjustment component (42), and the three-dimensional laser scanner (5) is mounted on the angle adjustment component (42); The surface of the medical bed (1) is provided with a fixing mechanism (8), the fixing mechanism (8) comprising a leg positioning component (81), a positioning bracket (82) and an abdomen positioning component (83), and a fixing component (9) is provided on the outside of the fixing mechanism (8).

2. The device for detecting patient body displacement during radiotherapy of thoracic and abdominal tumors according to claim 1, characterized in that: The height adjustment assembly (41) comprises a first fixing frame (411), a first adjustment rod (412), a fixing plate (413), a handle (414), a movable plate (415) and a guide rod (416); the front side surface of the adjustment ring (33) is fixedly connected with the first fixing frame (411); the first adjustment rod (412) is rotatably connected inside the first fixing frame (411); the upper end of the first adjustment rod (412) is fixedly connected with the fixing plate (413); the upper end edge of the fixing plate (413) is fixedly connected with the handle (414); the outer surface of the first adjustment rod (412) is movably connected with the movable plate (415); two groups of guide rods (416) are symmetrically installed on the inner side of the first fixing frame (411) with the first adjustment rod (412) as the center; holes matching the guide rods (416) are opened in the movable plate (415); and the angle adjustment assembly (42) is installed on the front side of the movable plate (415).

3. The device for detecting patient body displacement during radiotherapy of chest and abdominal tumors according to claim 2, characterized in that: The angle adjustment assembly (42) comprises a second fixed frame (421), a first movable groove (422), a connecting rod (423), a ball head (424), a movable tube (425) and a second adjustment rod (426); the front end of the movable plate (415) is fixedly connected to the second fixed frame (421); the interior of the second fixed frame (421) is provided with a first movable groove (422); the rear end of the three-dimensional laser scanner (5) is fixedly connected to the connecting rod (423); the rear end of the connecting rod (423) is fixedly connected to the ball head (424); two groups of second adjustment rods (426) are symmetrically arranged in the first movable groove (422) with the ball head (424) as the center; the inner ends of the two groups of second adjustment rods (426) are movably connected to the movable tube (425); the interior of the movable tube (425) is provided with a slot adapted to the ball head (424).

4. The device for detecting patient body displacement during radiotherapy of chest and abdominal tumors according to claim 1, characterized in that: The leg positioning assembly (81) comprises a fixing plate (811), a positioning plate (812) and a limiting plate (813); the fixing plate (811) is arranged at the front side of the surface of the medical bed (1); the positioning plate (812) is placed inside the fixing plate (811); the limiting plate (813) is arranged at the rear side of the fixing plate (811); and two groups of slots are provided inside the positioning plate (812) and the limiting plate (813).

5. The device for detecting patient body displacement during radiotherapy of chest and abdominal tumors according to claim 1, characterized in that: The surface of the medical bed (1) is provided with three groups of positioning brackets (82), and the positioning brackets (82) include a third fixed frame (821), a movable rod (822), an adjusting knob (823) and a hand positioning rod (824). The surface of the medical bed (1) is provided with three pairs of third fixed frames (821), the inner part of the third fixed frame (821) is movably connected with the movable rod (822), the outer side of the third fixed frame (821) is threadedly connected with the adjusting knob (823), the hand positioning rod (824) is fixedly installed on the movable rod (822) of the last group, and a limiting plate (813) is placed on the inner side of the first group of the third fixed frames (821).

6. The device for detecting patient body displacement during radiotherapy of chest and abdominal tumors according to claim 5, characterized in that: An abdominal positioning assembly (83) is arranged inside the movable rod (822) of the second group, and the abdominal positioning assembly (83) includes a fixing ring (831), a third adjusting rod (832) and a limiting block (833). The third adjusting rod (832) is fixedly connected to the center position of the movable rod (822) of the second group, the third adjusting rod (832) is internally threadedly connected to the third adjusting rod (832), and a limiting block (833) is installed at the bottom of the third adjusting rod (832).

7. The device for detecting patient body displacement during radiotherapy of chest and abdominal tumors according to claim 5, characterized in that: Two groups of air bags (815) are installed inside the hand positioning rod (824) of the first turn. The outer ends of the air bags (815) are connected to connecting pipes (814). The air bags (815) are located directly above the slots of the limiting plate (813).

8. The device for detecting patient body displacement during radiotherapy of chest and abdominal tumors according to claim 1, characterized in that: The fixing assembly (9) comprises a slide groove (91), a connecting block (92), a fixing knob (93), a slider (94) and a positioning ring (95); two groups of slide grooves (91) are provided on both sides of the surface of the medical bed (1); both sides of the fixing mechanism (8) are fixedly connected to the connecting block (92); a slider (94) is movably connected in the slide groove (91); the upper end of the slider (94) is rotatably connected to the fixing knob (93); the fixing knob (93) passes through the connecting block (92) and is located in the slide groove (91) and is movably connected to the positioning ring (95).

9. The device for detecting patient body displacement during radiotherapy of chest and abdominal tumors according to claim 1, characterized in that: The auxiliary component (35) comprises a fixed block (351), a connecting groove (352), a ball (353) and a protective gasket (354); four groups of fixed blocks (351) are fixedly connected to the outer surface of the adjustment ring (33); the four groups of fixed blocks (351) are arranged in pairs; a connecting groove (352) is provided inside the fixed block (351); six groups of ball (353) are installed at both ends of the opening of the connecting groove (352); and a protective gasket (354) is fixedly connected to the surface of the opening of the connecting groove (352).

10. The device for detecting patient body displacement during radiotherapy of chest and abdominal tumors according to claim 4, characterized in that: A gasket (10) is placed at the bottom of the positioning plate (812) and the limiting plate (813), and the diameter of the gasket (10) is matched with the inner diameter of the third fixing frame (821).

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