Transformable radiotherapy bed and use method thereof
By designing a radiation therapy bed with adjustable convex columns and columnar airbags, the problems of waste of fixed equipment resources and poor comfort in the prior art are solved, and personalized fixation and efficient treatment of patients are achieved.
Patent Information
- Application Number
- CN202510488057.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2025-06-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the tumor radiotherapy treatment, the existing radiotherapy beds are wasted due to individual differences in patients, and the equipment is complex and easy to deform, making it difficult to achieve personalized whole body fixation, affecting patient comfort and treatment efficiency.
A deformable radiation therapy bed is designed, and a number of high-adjustable convex columns and columnar airbags are used to achieve personalized fixation of the patient's position through the air pump and pressure sensor. Matrix slide holes and convex columns are installed on the bed board, and precise adjustment is performed through CT scan and depth scanner.
It achieves higher comfort and personalized fixation for patients, reduces consumables costs and equipment deformation, improves treatment efficiency, and can be fine-tuned according to the patient's weight during the treatment process.
Smart Images
Figure CN120154829A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a deformable radiotherapy bed and a using method thereof. Background Art
[0002] At present, since tumor radiotherapy is a long process, generally 3 - 33 consecutive treatments are required, once a day. After the first body position fixation, the patient undergoes a CT positioning scan to collect the patient's body position, human electron density, and relative spatial coordinate system. Then, through the design of the planning system, a radiotherapy plan is formulated. The patient needs to maintain the same body position during each treatment, and there are relatively strict requirements for the fixation of the patient's body position. The positioning error for each time needs to be controlled within 2 - 5 mm. Currently, we generally use personalized vacuum pads, personalized masks, and personalized meshes for fixation, and these molds generally come with corresponding fixed bottom plates.
[0003] Due to the individual differences of patients, we need to perform personalized fixation on patients to facilitate repeated positioning and irradiation each time, and ensure that the patient's body position remains fixed during irradiation. Since there are more and more patients who need to receive tumor radiotherapy now, these pads and masks are also increasing, which is also a consumption of resources. Each radiotherapy department also needs a large space to store the relevant fixation molds, and these molds will also be damaged or deformed during use and need to be remade, with a complex process and a delay in treatment time. At the same time, patients with tumors in different parts also use different positioning molds and bed plates, and the base and the fixed film on it need to be replaced repeatedly. Due to the body length problem of patients, few current fixation devices can achieve full-body personalized fixation. Generally, personalized fixation within the tumor range is adopted according to the tumor site. For example, when performing radiotherapy on the chest, only the head, neck, chest, and abdomen are fixed, and the pelvis and legs are not fixed, and the comfort is relatively poor. To achieve full fixation, more consumables and body position fixation devices are required, which also increases the workload and is basically not recommended.
[0004] In view of this, the present solution is thus produced. Summary of the Invention
[0005] In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a deformable radiotherapy bed and a using method thereof, which use convex columns with different heights to fix the patient's body position, making the patient more comfortable, and one treatment bed can be used for multiple purposes, reducing the consumable cost, not easily deformed, can be reused, and can be finely adjusted according to the patient's body fatness during the treatment process, and improving the patient's comfort.
[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a deformable radiotherapy bed, which includes a bed board body, a plurality of convex columns, a plurality of columnar air bags, a plurality of air pumps, a plurality of pressure sensors and a control center. The bed board body includes a head corresponding area, a body corresponding area and a leg corresponding area. The surfaces of the head corresponding area, the body corresponding area and the leg corresponding area are provided with sliding holes arranged in a matrix. A plurality of the convex columns are respectively arranged in a plurality of the sliding holes. The columnar air bags are arranged in the sliding holes and are located below the convex columns. A plurality of the air pumps inflate the columnar air bags. The columnar air bags drive the convex columns to move up and down through inflation and deflation. A plurality of the pressure sensors are respectively used to detect the air pressure in the columnar air bags and in the chamber formed by the air pipes connecting the air bags and the air pumps. The telescopic amount of the columnar air bags is judged according to the air pressure values of the pressure sensors. The control center drives a plurality of air pumps to inflate according to the three-dimensional scan model of the patient and records the air pressure values of each pressure sensor.
[0007] Further, the radiotherapy bed further includes a depth scanner, which is arranged above the bed board body, and the scanning end of the depth scanner faces the bed board body.
[0008] Further, the convex column includes a column body and a flipping head. The flipping head is hinged left and right with the upper end of the column body. A constriction is formed at the upper end of the sliding hole, and the column body is adapted to the constriction. A locking plate is arranged at the lower end of the column body, and the locking plate is located in the sliding hole and is slidably connected.
[0009] Further, a hinge plate is formed at the lower end of the flipping head, and rotating shafts are formed on both sides of the hinge plate. A hinge notch is formed on the upper surface of the column body, and shaft holes are formed on both sides of the hinge notch. The rotating shafts are rotatably connected in the shaft holes, and a plastic torsion spring is further arranged between the rotating shafts and the shaft holes.
[0010] Further, a flexible gasket is attached to the flipping head.
[0011] Further, three air guiding plates are arranged at intervals up and down at the tail end of the bed board body. A plurality of air guiding holes are formed on the air guiding plates. The three air guiding plates respectively correspond to the head corresponding area, the body corresponding area and the leg corresponding area from top to bottom. The air guiding holes are used to fix and tighten the air pipes between the air pumps and the columnar air bags.
[0012] A using method of a deformable radiotherapy bed is characterized by including the following steps:
[0013] S1. Obtain the external contour shape of the human body through a preliminary CT scan;
[0014] S2. Formulate the height adjustment plan for each convex column according to the shape of the human body outline, and drive the convex columns on the corresponding areas of the head, body and legs to move upward according to the height adjustment plan of each convex column to form an outer contour lying flat fixation area that fits the human body outline;
[0015] S3. The patient lies flat in the outer contour lying flat fixation area and places the hands according to the examination requirements;
[0016] S4. Adjust the convex columns in the corresponding areas according to the actual situation and the comfort of the patient's actual lying position;
[0017] S5. Record the information of each adjusted convex column and store and number it.
[0018] Furthermore, in step S2, the rise of the convex column is realized by the inflation of the columnar airbag, and the expansion and contraction formula of the columnar airbag is as follows:
[0019] △L = (P * L0 * R) / (Ea * t); where △L is the expansion and contraction amount up and down, P is the air pressure value, L0 is the initial length, R is the radius of curvature of the columnar airbag, Ea is the elastic modulus in the axial direction, and t is the thickness of the columnar airbag.
[0020] Furthermore, in step S2, each airbag is numbered. According to the corresponding areas of the head, body and legs, they correspond to three numbers a, b and c. Each airbag in each area is numbered from 1 - N according to the number of rows, and each row of airbags is numbered from 1 - N.
[0021] Furthermore, in step S2, after the outer contour lying flat fixation area is formed, the depth scanner performs a secondary scan on the bed board body to obtain the height data of each convex column and compares it with the height adjustment plan of each convex column. If the comparison result is consistent, the next step is carried out. If the comparison result is inconsistent, the airbag of the convex column in the inconsistent area is inflated or deflated for adjustment, and then the scanning and comparison of the depth scanner are repeated until the comparison result is consistent.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] The present invention provides a deformable radiotherapy bed and a usage method. Through preliminary CT scanning, the external contour of the human body is obtained. Then, based on the data obtained from the external contour of the human body, the heights of the convex columns on the bedplate body are adjusted to form an external contour lying flat and fixing area that fits the external contour of the human body. After the patient lies flat in the external contour lying flat and fixing area, manual adjustment is performed to form a dedicated external contour lying flat and fixing area. Different heights of convex columns are used to fix the patient's body position, making the patient more comfortable. Moreover, one treatment bed can be used for multiple purposes, reducing the consumable cost. At the same time, it is not easily deformed, can be reused, and can be finely adjusted according to the patient's body fat or thinness during the treatment process, and improves the patient's comfort. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a front view structural schematic diagram of a deformable radiotherapy bed according to the present invention;
[0025] Figure 2 It is a three-dimensional structural schematic diagram of the bedplate main body in the present invention;
[0026] Figure 3 It is a top view structural schematic diagram of the bedplate main body in the present invention;
[0027] Figure 4 It is a sectional structural schematic diagram of the airbag in the present invention in a fully compressed state;
[0028] Figure 5 It is a sectional structural schematic diagram of the airbag in the present invention in a semi-inflated state;;
[0029] Figure 6 It is a sectional structural schematic diagram of the airbag in the present invention in a fully inflated state;;
[0030] Figure 7 It is a flowchart of the usage method of a deformable radiotherapy bed according to the present invention.
[0031] Reference numerals in the figures: 1. Bedplate body; 11. Head corresponding area; 12. Body corresponding area; 13. Leg corresponding area; 14. Air guide plate; 2. Convex column; 21. Column body; 211. Hinge notch; 212. Stopping plate; 22. Flipping head; 221. Hinge plate; 23. Flexible gasket; 3. Columnar airbag; 4. Depth scanner. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0032] In order to make the above features and advantages of the present invention more obvious and understandable, specific embodiments are hereinafter given and detailed descriptions are made in conjunction with the accompanying drawings as follows.
[0033] As Figures 1-7As shown in the figure, this embodiment provides a deformable radiotherapy bed, which includes a bed board body 1, a plurality of convex columns 2, a plurality of columnar air bags 3, a plurality of air pumps, a plurality of pressure sensors, a depth scanner 4 and a control center.
[0034] In this solution, the material of the bed board body 1 is plastic. The bed board body 1 includes a head corresponding area 11, a body corresponding area 12 and a leg corresponding area 13. The surfaces of the head corresponding area 11, the body corresponding area 12 and the leg corresponding area 13 are provided with sliding holes arranged in a matrix. A plurality of convex columns 2 are respectively arranged in a plurality of sliding holes. The convex columns 2 are made of carbon fiber material. The convex columns 2 include a column body 21 and a flipping head 22. A flexible gasket 23 is attached to the flipping head 22. The flipping head 22 is hinged to the upper end of the column body 21 on the left and right. A constriction is formed at the upper end of the sliding hole. The column body 21 is adapted to the constriction. A locking plate 212 is arranged at the lower end of the column body 21. The locking plate 212 is located in the sliding hole and is slidably connected. Specifically, a hinge plate 221 is formed at the lower end of the flipping head 22. Rotating shafts are formed on both sides of the hinge plate 221. A hinge notch 211 is formed on the upper surface of the column body 21. Axial holes are formed on both sides of the hinge notch 211. The rotating shafts are rotatably connected in the axial holes. A plastic torsion spring is also arranged between the rotating shafts and the axial holes.
[0035] By arranging the flipping head 22 and the column body 21 to be hinged, when a patient lies on a plurality of convex columns 2, the flipping head 22 can fit the patient's skin and deflect according to the force direction, making the patient lie flat more comfortably.
[0036] The columnar air bags 3 are arranged in the sliding holes and are located below the convex columns 2. The columnar air bags 3 are made of rubber or high molecular composite materials. The diameter of the columnar air bags 3 in the deflated state is the same as or slightly smaller than that of the sliders. An air inlet interface is arranged at the lower end of the columnar air bags 3. A retaining ring is arranged below the sliding holes. The air inlet interface extends out from the middle of the retaining ring. A plurality of air pumps inflate the columnar air bags 3. The columnar air bags 3 drive the convex columns 2 to move up and down through inflation and deflation. The air pumps are micro air pumps. The air pumps and the air bags are connected through air pipes. Since the number of air pumps is relatively large, the air pumps are arranged in an external integrated manner, and the length of the air pipes is longer than the length of the bed board body 1, which is convenient for adaptive adaptation when the bed board body 1 moves into the detection end.
[0037] The reason why this solution uses the air bag method to drive the convex columns 2 to move up and down instead of using the air chamber method to move up and down is that the air chamber has high sealing requirements, and the number of convex columns 2 is relatively large. It is impossible to open so many airtight sliding holes on the bed board body 1. Therefore, this solution uses the air bag method to realize the up and down movement of the convex columns 2.
[0038] At the tail end of the bed board body 1, there are three air guide plates 14 arranged at intervals up and down. Multiple air guide holes are formed on the air guide plates 14. The three air guide plates 14 correspond to the head corresponding area 11, the body corresponding area 12, and the leg corresponding area 13 from top to bottom in sequence. The air guide holes are used to fix the trachea between the air pump and the columnar airbag 3. The arrangement of the air guide holes is to centralize and arrange multiple tracheas to prevent phenomena such as knotting between the tracheas during daily operation.
[0039] Preferably, a plastic tube is sleeved on the outer peripheral surface of part of the trachea. The plastic tube is located within the air guide hole and is fixedly connected to the outer periphery of the trachea. When the bed board body 1 moves, the plastic tube slides against the air guide hole to avoid damage to the trachea during the sliding process.
[0040] Multiple pressure sensors are respectively used to detect the air pressure within the columnar airbag 3 and within the chamber formed by the trachea connecting the airbag and the air pump. The expansion and contraction amount of the columnar airbag 3 is judged based on the air pressure value of the pressure sensor. The control center drives multiple air pumps to inflate according to the three-dimensional scan model of the patient and records the air pressure values of each pressure sensor.
[0041] The depth scanner 4 is arranged above the bed board body 1. The depth scanner 4 can adopt an RGB-D camera, a laser rangefinder, or existing equipment that can scan the depth of the recognizable area. The scanning end of the depth scanner 4 faces the bed board body 1. The function of the depth scanner 4 is that after the convex columns 2 are initially adjusted according to the CT scan model, the bed board body 1 is scanned by the depth scanner 4 for re-verification to detect whether the movement amount of the convex columns 2 on the bed board body 1 conforms to the movement amount of each convex column 2 converted from the CT scan model.
[0042] This solution also provides a usage method for a deformable radiotherapy bed, including the following steps:
[0043] S1. Obtain the external contour shape of the human body through a preliminary CT scan.
[0044] S2. Form a height adjustment plan for each convex column 2 according to the external contour shape of the human body. Drive the convex columns 2 on the head corresponding area 11, the body corresponding area 12, and the leg corresponding area 13 to move upward according to the height adjustment plan for each convex column 2 to form an outer contour lying flat and fixing area that fits the external contour of the human body.
[0045] S3. The patient lies flat within the outer contour lying flat and fixing area and places their hands according to the examination requirements.
[0046] S4. Adjust the convex columns 2 in the corresponding area according to the actual situation and the comfort of the patient's actual lying position.
[0047] S5. Record the information of each adjusted convex column 2 and store and number it.
[0048] In step S1, for the tomographic images (such as cross-section, sagittal plane, and coronal plane) generated by CT scanning, three-dimensional coordinate point cloud data of the human skin surface is extracted using image processing techniques (such as edge detection and threshold segmentation).
[0049] In step S2, the three-dimensional coordinate point cloud data is sent to the control center for processing. The most prominent point on the back of the head is taken as the lowest point, that is, point 0, and the airbag is not inflated. The three-dimensional coordinate points of each part of the body are obtained. There is a convex column 2 on the head corresponding area 11, and the airbag is inflated to lift it. Based on the position of the convex column 2 corresponding to the highest point of the patient's head as a reference, the three-dimensional coordinate point cloud data is mapped to the plane of the bed board body 1, so that the convex columns 2 on the head corresponding area 11, the body corresponding area 12, and the leg corresponding area 13 are adjusted in height according to the three-dimensional coordinates, forming an outer contour flat lying fixed area.
[0050] In step S2, each airbag is numbered. According to the head corresponding area 11, the body corresponding area 12, and the leg corresponding area 13, they correspond to three numbers a, b, and c. The airbags in each area are numbered from 1 - N according to the number of rows, and each row of airbags is numbered from 1 - N. For example, the first airbag in the first row of the head corresponding area 11 is numbered a11. Setting the numbers is to facilitate distinguishing each air pump and achieve individual and precise control of each airbag.
[0051] In step S2, after the outer contour flat lying fixed area is formed, the depth scanner 4 performs a secondary scan on the bed board body 1 to obtain the height data of each convex column 2 and compares it with the height adjustment plan (three-dimensional coordinates) of each convex column 2. If the comparison results are consistent, the next step is carried out. If the comparison results are inconsistent, the airbags of the convex columns 2 in the inconsistent area are inflated or deflated for adjustment, and then the scanning and comparison of the depth scanner 4 are repeated until the comparison results are consistent.
[0052] In step S2, the rise of the convex column 2 is achieved by inflating the columnar airbag 3. The telescopic amount of the columnar airbag 3 is hooked to the diameter and height of the columnar airbag 3 in the initial state. Since in this solution, the diameter of the columnar airbag 3 in the deflated state is the same as or slightly smaller than the slider, and the columnar airbag 3 is arranged in the sliding hole, the influence of the displacement in the radial direction on the displacement in the axial direction can be almost ignored. The telescopic amount formula of the columnar airbag 3 is as follows: △L = (P * L0 * R) / (Ea * t); where △L is the up and down telescopic amount, P is the air pressure value, L0 is the initial length, R is the radius of curvature of the columnar airbag 3, Ea is the elastic modulus of the columnar airbag 3 in the axial direction, and t is the thickness of the columnar airbag 3.
[0053] In this method, an airbag compensation method is also provided. When a patient lies on the flat fixed area of the outer contour, the airbag is compressed under force, and the compression amount is greater than the extension amount of the airbag, resulting in the destruction of the concave-convex relationship in some areas of the flat fixed area of the outer contour. When the airbag is compressed and the diameter of the airbag is the same as that of the chamber (radial expansion is completely restricted), the telescopic amount is mainly reflected as the axial compression amount, and its formula can be expressed as: △L(compressed) = ((P2 - P1) * L0 / Ea) * (D0 * 2t) + ((nRT / P2) * (1 / V1 - 1 / V2)), where P1 and P2 are the air pressure values before adjustment and after the patient lies on it respectively, L0 is the height of the columnar airbag 3 before compression, D0 is the diameter of the columnar airbag 3, Ea is the axial elastic modulus of the columnar airbag 3, t is the thickness of the columnar airbag 3, nRT is the parameter of the gas state equation (ideal gas), and V1 and V2 are the volumes before and after compression, and V1 and V2 are calculated by PV = nRT (constant temperature condition).
[0054] The value of △L(compressed) is calculated through the above formula, which is the downward displacement value of the convex column 2 in the stressed state. Then, the airbag corresponding to the convex column 2 covered by the flat fixed area of the outer contour is moved upward for compensation, and the compensation value is the downward displacement value. In this way, the destruction of the concave-convex relationship in some areas of the flat fixed area of the outer contour can be avoided.
[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. A deformable radiotherapy bed, characterized in that: The invention comprises a bed board body, a plurality of convex columns, a plurality of columnar airbags, a plurality of air pumps, a plurality of pressure sensors and a control center. The bed board body comprises a head corresponding area, a body corresponding area and a leg corresponding area. The surfaces of the head corresponding area, the body corresponding area and the leg corresponding area are provided with sliding holes arranged in a matrix. The plurality of convex columns are respectively arranged in the plurality of sliding holes. The columnar airbags are arranged in the sliding holes and are located below the convex columns. The plurality of air pumps inflate the columnar airbags. The columnar airbags drive the convex columns to move up and down by inflation and deflation. The plurality of pressure sensors are respectively used to detect the air pressure in the columnar airbags and in the chamber formed by the air pipe connecting the airbags and the air pumps. The expansion and contraction amount of the columnar airbags is judged by the air pressure value of the pressure sensor. The control center drives the plurality of air pumps to inflate according to the three-dimensional scanning model of the patient and records the air pressure value of each pressure sensor.
2. The deformable radiotherapy bed according to claim 1, characterized in that: The radiotherapy bed also includes a depth scanner, which is arranged above the bed body, and a scanning end of the depth scanner faces the bed body.
3. The deformable radiotherapy couch according to claim 1, characterized in that: The convex column includes a column and a flip head, the flip head is hinged to the upper end of the column left and right, a constriction is formed at the upper end of the sliding hole, the column is adapted to the constriction, and a locking plate is arranged at the lower end of the column, the locking plate is located in the sliding hole and is slidably connected.
4. The deformable radiotherapy couch according to claim 3, characterized in that: A hinge plate is formed at the lower end of the flip head, a rotating shaft is formed on both sides of the hinge plate, a hinge notch is formed on the upper surface of the column, shaft holes are formed on both sides of the hinge notch, the rotating shaft is rotatably connected in the shaft hole, and a plastic torsion spring is also arranged between the rotating shaft and the shaft hole.
5. The deformable radiotherapy couch according to claim 3, characterized in that: A flexible gasket is attached to the flip head.
6. The deformable radiotherapy couch according to claim 1, characterized in that: The rear end of the bed board body is provided with three air guide plates spaced apart up and down, and a plurality of air guide holes are formed on the air guide plates. The three air guide plates correspond to the head corresponding area, the body corresponding area and the leg corresponding area from top to bottom, and the air guide holes are used to fix and tighten the air pipe between the air pump and the cylindrical air bag.
7. A method for using a deformable radiotherapy couch according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Perform a preliminary CT scan to obtain the external contour of the human body; S2. Forming height adjustment schemes for each convex column according to the shape of the human body's outer contour, and driving the convex columns on the head corresponding area, the body corresponding area, and the leg corresponding area to move upward according to the height adjustment schemes for each convex column to form a flat-lying fixed area that fits the outer contour of the human body; S3, the patient lies flat in the outer contour flat fixed area and places the hands according to the examination requirements; S4. Adjust the convex columns in the corresponding areas according to the actual situation and the patient's actual lying comfort; S5. Record the adjusted information of each boss and store and number them.
8. The method for using a deformable radiotherapy couch according to claim 7, characterized in that: In step S2, the rise of the convex column is achieved by inflating the cylindrical airbag, and the expansion and contraction amount formula of the cylindrical airbag is as follows: △L=(P*L0*R) / (Ea*t); △L is the vertical expansion and contraction, P is the air pressure value, L0 is the initial length, R is the curvature radius of the cylindrical airbag, Ea is the axial elastic modulus, and t is the thickness of the cylindrical airbag.
9. The method for using a deformable radiotherapy couch according to claim 7, characterized in that: In the step S2, each airbag is numbered, and three numbers a, b and c are corresponding to the head corresponding area, the body corresponding area and the leg corresponding area. The airbags in each area are numbered 1-N according to the number of rows, and the airbags in each row are numbered 1-N.
10. The method for using a deformable radiotherapy couch according to claim 7, characterized in that: In the step S2, after the outer contour lying fixed area is formed, the depth scanner performs a second scan on the bed board body to obtain the height data of each boss and compares it with the height adjustment scheme of each boss. If the comparison results are consistent, the next step is performed. If the comparison results are inconsistent, the airbags of the bosses in the inconsistent areas are inflated or deflated, and then the scanning and comparison of the depth scanner are repeated until the comparison results are consistent.