A medical linear accelerator treatment bed and its control method

Abstract

This invention discloses a medical linear accelerator treatment bed and its control method. The medical linear accelerator treatment bed includes: a main treatment bed installed on a first side of the medical linear accelerator; and a secondary treatment bed installed on a second side of the medical linear accelerator, wherein the first side and the second side are located on opposite sides of the medical linear accelerator. The main treatment bed includes a main treatment bed board, and the secondary treatment bed includes a secondary treatment bed board. The main treatment bed board and / or the secondary treatment bed board can reciprocate along a first direction approaching / away from the medical linear accelerator. By controlling the sliding of the main treatment bed board and / or the secondary treatment bed board to the isocenter position of the medical linear accelerator, they are docked and connected with the secondary treatment bed board / main treatment bed board. During radiotherapy, the docking connection between the main treatment bed board and the secondary treatment bed effectively solves the error problem caused by the sinking of a single cantilever structure.

Description

Technical Field

[0001] This invention relates to the field of mechanical structure technology for medical linear accelerators, specifically to a medical electronic linear accelerator treatment bed and its control method. Background Technology

[0002] A medical linear accelerator is a medical device used for radiotherapy of tumors or other lesions in patients. During radiotherapy, the accelerator rotates to locate the lesion site, thereby directing the radiation beam towards the lesion site.

[0003] During treatment, the patient's lesion is positioned at the center of the medical linear accelerator using a treatment bed. To ensure that the accelerator rays can accurately irradiate the lesion and reduce damage to the patient's healthy areas, the treatment bed needs to be positioned with high accuracy. Currently, most treatment beds on the market are cantilevered structures. Due to the rigidity of the treatment bed, the deformation of the treatment bed at the center position can cause errors and affect the effectiveness of radiotherapy.

[0004] In addition, with the development of three-dimensional intensity-modulated radiotherapy technology, the demand for rotational therapy using medical linear accelerators is becoming increasingly common. When the radiation passes through the back and oblique rear of the treatment bed, the treatment bed will attenuate the radiation dose, resulting in the patient's lesion site not receiving a precise radiation therapy dose.

[0005] In view of this, this invention patent is hereby proposed. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a medical linear accelerator treatment bed and its control method, which can effectively reduce the settling error of the treatment bed and further eliminate the attenuation effect of the treatment bed on radiation.

[0007] Specifically, the following technical solution was adopted:

[0008] A medical linear accelerator treatment bed, comprising:

[0009] The main treatment bed is installed on the first side of the medical linear accelerator;

[0010] A secondary treatment bed is installed on the second side of the medical linear accelerator, with the first and second sides located on opposite sides of the medical linear accelerator, respectively.

[0011] The main treatment bed includes a main treatment bed board, and the auxiliary treatment bed includes an auxiliary treatment bed board. The main treatment bed board and / or the auxiliary treatment bed board can slide back and forth along a first direction close to / away from the medical electronic linear accelerator. By controlling the main treatment bed board and / or the auxiliary treatment bed board to slide to the isocenter position of the medical electronic linear accelerator, they can dock and connect with the auxiliary treatment bed board / main treatment bed board.

[0012] As an optional embodiment of the present invention, the main treatment bed includes a main treatment bed base, and the main treatment bed board is slidably mounted on the main treatment bed base along a first direction; the auxiliary treatment bed includes an auxiliary treatment bed base, and the auxiliary treatment bed board is slidably mounted on the auxiliary treatment bed base along a first direction.

[0013] A first telescopic rod mechanism is installed on the main treatment bed board, and / or a second telescopic rod mechanism is installed on the auxiliary treatment bed board. After the main treatment bed board and the auxiliary treatment bed board are controlled to slide to the isocenter position of the medical electronic linear accelerator, they are connected by inserting the first telescopic rod mechanism into the auxiliary treatment bed board, and / or by inserting the second telescopic rod mechanism into the main treatment bed board.

[0014] As an optional embodiment of the present invention, the main treatment bed board includes a main bed board and multiple segmented bed boards. The first telescopic rod mechanism is installed at the bottom of the main bed board and includes a first motor and a first lead screw connected to the motor shaft of the first motor. Each segmented bed board is provided with a through first lead screw nut, and the first lead screw sequentially passes through and connects the first lead screw nuts of multiple segmented bed boards.

[0015] The second telescopic rod mechanism includes a second motor and a second lead screw connected to the motor shaft of the second motor, and a through second lead screw nut is provided in each of the segmented bed plates;

[0016] After the main treatment bed board is slid to the isocenter position of the medical linear accelerator, the second lead screw of the second telescopic rod mechanism is extended and connected to the second lead screw nut on the segmented bed board. By controlling the first and second telescopic rod mechanisms to operate in opposite directions, the segmented bed boards are slid one by one from the main bed board side to the auxiliary treatment bed board side until the hollow space formed between the segmented bed boards is aligned with the position of the patient's lesion. Then, the first and second telescopic rod mechanisms stop operating.

[0017] As an optional embodiment of the present invention, the first telescopic rod mechanism includes two parts, which are respectively installed on the bottom sides of the main bed board, and two first lead screw nuts are respectively provided on the segmented bed board corresponding to the two first telescopic rod mechanisms; the second telescopic rod mechanism includes two parts, which are respectively installed on the bottom sides of the auxiliary treatment bed, and two second lead screw nuts are respectively provided on the segmented bed board corresponding to the two second telescopic rod mechanisms; the distance between the two first telescopic mechanisms is not equal to the distance between the two second telescopic mechanisms, the distance between the two first lead screw nuts is equal to the distance between the two first telescopic mechanisms, and the distance between the two second lead screw nuts is equal to the distance between the two second telescopic mechanisms.

[0018] As an optional embodiment of the present invention, the length of the main treatment bed board formed by splicing the main bed board and multiple segmented bed boards is L0, and the total length of the multiple segmented bed boards tightly spliced ​​together is L1, wherein L1≥L0 / 2.

[0019] As an optional embodiment of the present invention, the main treatment bed base is installed on the first side of the medical electronic linear accelerator, and the main treatment bed base can slide back and forth along a second direction perpendicular to the first direction; the auxiliary treatment bed base is installed on the second side of the medical electronic linear accelerator, and the auxiliary treatment bed base can slide back and forth along a second direction perpendicular to the first direction.

[0020] By controlling the movement of the main treatment bed base and the main treatment bed board, the patient's lesion is adjusted to be at the isocenter position of the medical electronic linear accelerator. By controlling the movement of the auxiliary treatment bed base and the auxiliary treatment bed board, the auxiliary treatment bed board is adjusted to be connected to the main treatment bed board, and the slotted space formed by the sliding of the segmented bed board is adjusted to be relative to the position of the patient's lesion.

[0021] As an optional embodiment of the present invention, the main treatment bed base includes a main base plate, a main support plate and a main support rod connecting the main base plate and the main support plate. A first longitudinal guide rail extending in a first direction is provided on the main support plate, and the main bed plate is slidably mounted on the first longitudinal guide rail.

[0022] The main base plate is provided with a first transverse guide rail extending along a second direction perpendicular to the first direction, and the main base plate is slidably mounted on the medical electronic linear accelerator via the first transverse guide rail;

[0023] Optionally, the main support rod is an electric push rod that can be raised and lowered.

[0024] As an optional embodiment of the present invention, the auxiliary treatment bed base includes an auxiliary base plate, an auxiliary support plate, and an auxiliary support rod connecting the auxiliary base plate and the auxiliary support plate. The auxiliary support plate is provided with a second longitudinal guide rail extending in a first direction, and the auxiliary bed plate is slidably mounted on the second longitudinal guide rail.

[0025] The sub-base plate is provided with a second transverse guide rail extending in a second direction perpendicular to the first direction, and the sub-base plate is slidably mounted on the medical electronic linear accelerator via the second transverse guide rail;

[0026] Optionally, the auxiliary support rod is an electric push rod that can be raised and lowered.

[0027] This invention also provides a control method for a medical linear accelerator treatment bed, comprising:

[0028] Control the main treatment bed board and / or auxiliary treatment bed board to slide to the isocenter position of the medical electronic linear accelerator, and dock with the auxiliary treatment bed board / main treatment bed board.

[0029] As an optional embodiment of the present invention, a control method for a medical linear accelerator treatment bed of the present invention includes:

[0030] Controlling the movement of the main treatment bed base and the main treatment bed board adjusts the patient's lesion to the isocenter position of the medical electronic linear accelerator;

[0031] The distance S between the auxiliary treatment bed board and the main treatment bed board is determined based on the size of the patient's lesion.

[0032] Control the movement of the auxiliary treatment bed base and auxiliary treatment bed board, adjust the distance between the auxiliary treatment bed board and the main treatment bed board to S, and control the second lead screw of the second telescopic rod mechanism to extend and connect with the second lead screw nut on the segmented bed board.

[0033] Based on the location of the patient's lesion, the first telescopic rod mechanism and the second telescopic rod mechanism are controlled to operate in opposite directions, and the segmented bed boards are slid one by one from the main bed board side to the auxiliary treatment bed board side until the hollow space formed between the segmented bed boards is aligned with the location of the patient's lesion. Then, the first telescopic rod mechanism and the second telescopic rod mechanism are controlled to stop operating.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] The present invention discloses a medical linear accelerator treatment bed, which is assembled from a main treatment bed and a secondary treatment bed located on both sides of a medical linear accelerator. During radiotherapy, the main treatment bed and the secondary treatment bed are connected to form a treatment bed supported on both sides of the medical linear accelerator, effectively solving the error problem caused by the sinking of the cantilever structure of a single treatment bed.

[0036] This invention controls the first telescopic rod mechanism in the main treatment bed board and the second telescopic rod mechanism in the auxiliary treatment bed board to operate in opposite directions, sliding the segmented bed boards one by one from the main bed board side to the auxiliary treatment bed board side until the hollow space between the segmented bed boards is opposite to the patient's lesion position. This can create an unobstructed area at the patient's lesion site, effectively solving the problem of radiation shielding by the treatment bed board, and allowing the patient to receive a more accurate radiation dose. Attached image description:

[0037] Figure 1 A diagram illustrating the usage state of a medical linear accelerator treatment bed according to an embodiment of the present invention;

[0038] Figure 2 A three-dimensional structural schematic diagram of a medical linear accelerator treatment bed according to an embodiment of the present invention;

[0039] Figure 3 A three-dimensional structural diagram of the main bed board and the auxiliary bed board according to an embodiment of the present invention;

[0040] Figure 4 A three-dimensional structural diagram of the segmented bed board according to an embodiment of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] See Figure 1 and Figure 2 As shown, a medical linear accelerator treatment bed according to this embodiment includes:

[0047] The main treatment bed 200 is installed on the first side of the medical linear accelerator 100;

[0048] A secondary treatment bed 300 is installed on the second side of the medical linear accelerator 100, wherein the first side and the second side are respectively located on opposite sides of the medical linear accelerator 100.

[0049] The main treatment bed 200 includes a main treatment bed board 201, and the auxiliary treatment bed 300 includes an auxiliary treatment bed board 301. The main treatment bed board 201 and / or the auxiliary treatment bed board 301 can be positioned along a first direction close to / away from the medical linear accelerator 1000 (e.g., ...). Figure 1 The main treatment bed 201 and / or the auxiliary treatment bed 301 are slid back and forth in the F1 direction. By controlling the main treatment bed 201 and / or the auxiliary treatment bed 301 to slide to the isocenter position of the medical electronic linear accelerator 100, they are docked and connected with the auxiliary treatment bed 301 / main treatment bed 201.

[0050] This embodiment of a medical linear accelerator treatment bed is assembled from a main treatment bed 200 and a secondary treatment bed 300 located on both sides of a medical linear accelerator 100. During radiotherapy, the main treatment bed 201 and the secondary treatment bed 300 are connected to form a treatment bed supported on both sides of the medical linear accelerator 100, which effectively solves the error problem caused by the sinking of the cantilever structure of a single treatment bed.

[0051] Specifically, in this embodiment, the main treatment bed 201 can be positioned along a first direction that is close to / away from the medical linear accelerator 1000 (e.g., ...). Figure 1 The main treatment bed 201 slides back and forth in the F1 direction, and the auxiliary treatment bed 301 is in a fixed position. It is then connected to the auxiliary treatment bed 301 by sliding the main treatment bed 201.

[0052] Alternatively, the auxiliary treatment bed 301 in this embodiment may be positioned along a first direction close to / away from the medical linear accelerator 1000 (e.g., Figure 1 The main treatment bed board 201 is in a fixed position and slides back and forth in the F1 direction. The auxiliary treatment bed board 301 slides to the main treatment bed board 201 for docking and connection.

[0053] Alternatively, in this embodiment, both the main treatment bed 201 and the auxiliary treatment bed 301 can be positioned along a first direction that approaches / moves away from the medical linear accelerator 1000 (e.g., Figure 1 The main treatment bed 201 and the auxiliary treatment bed 301 slide back and forth in the F1 direction, and are connected to the isocenter position of the medical electronic linear accelerator 100 by controlling the main treatment bed 201 and the auxiliary treatment bed 301 to slide.

[0054] Furthermore, in order to achieve the docking connection between the main treatment bed board 201 and the auxiliary treatment bed board 301, see [reference needed]. Figures 1 to 3 As shown, the main treatment bed 200 in this embodiment includes a main treatment bed base 202, and the main treatment bed board 201 can be positioned along a first direction (e.g., Figure 1 The auxiliary treatment bed 300 includes a base 302 and a board 301 that slides reciprocally along a first direction (e.g., F1 direction). The auxiliary treatment bed 300 is mounted on the main treatment bed base 202 and the auxiliary treatment bed 300 includes a base 302. The auxiliary treatment bed board 301 can slide along a first direction (e.g., F1 direction) on the main treatment bed base 202. Figure 1 The device is mounted on the auxiliary treatment bed base 302 and slides back and forth in the F1 direction.

[0055] In this embodiment, a first telescopic rod mechanism 400 is installed on the main treatment bed board 201, and / or a second telescopic rod mechanism 500 is installed on the auxiliary treatment bed 301. After the main treatment bed board 201 and the auxiliary treatment bed board 301 are slid to the isocenter position of the medical linear accelerator 100, they are connected by inserting the first telescopic rod mechanism 400 into the auxiliary treatment bed board 301, and / or by inserting the second telescopic rod mechanism 500 into the main treatment bed board 201.

[0056] In this embodiment, the first telescopic rod mechanism 400 and / or the second telescopic rod mechanism 500 extend and insert into the auxiliary treatment bed 301 and / or the main treatment bed board 201 to achieve docking connection.

[0057] As an optional implementation method of this embodiment, see Figures 2-4As shown, the main treatment bed board 201 in this embodiment includes a main bed board 201A and multiple segmented bed boards 201B. The first telescopic rod mechanism 400 is installed at the bottom of the main bed board 201A and includes a first motor 401 and a first lead screw 403 connected to the motor shaft of the first motor 401. Each segmented bed board 201B is provided with a through first lead screw nut 601, and the first lead screw 403 sequentially passes through and connects the first lead screw nuts 601 of multiple segmented bed boards 201B.

[0058] The second telescopic rod mechanism 500 described in this embodiment includes a second motor 501 and a second lead screw 503 connected to the motor shaft of the second motor 501. A through second lead screw nut 602 is provided in each of the segmented bed plates 201B.

[0059] In this embodiment, a medical linear accelerator treatment bed is designed to slide the main treatment bed board 201 to the isocenter position of the medical linear accelerator 100. Then, the second lead screw 503 of the second telescopic rod mechanism 500 is extended and engages with the second lead screw nut 602 on the segmented bed board 201B. By controlling the first telescopic rod mechanism 400 and the second telescopic rod mechanism 500 to operate in opposite directions, the segmented bed boards 201B are slid one by one from the side of the main bed board 201A to the side of the auxiliary treatment bed board 301 until the space between the segmented bed boards 201B is aligned with the position of the patient's lesion. At this point, the first telescopic rod mechanism 400 and the second telescopic rod mechanism 500 stop operating.

[0060] In this embodiment, the main treatment bed board 201 consists of a main bed board 201A and multiple segmented bed boards 201B. In the initial state, the multiple segmented bed boards 201B are tightly spliced ​​with the main bed board 201A to form the completed main treatment bed board. The patient lies on the main treatment bed board, keeping the lesion position on the segmented bed boards 201B.

[0061] In this embodiment, after the main treatment bed board 201 is slid to the isocenter position of the medical electronic linear accelerator 100, the second lead screw 503 of the second telescopic rod mechanism 500 is controlled to extend and connect with the second lead screw nut 602 on the segmented bed board 201B, thereby realizing the docking connection between the main treatment bed board 201 and the auxiliary treatment bed board 301.

[0062] Furthermore, in this embodiment, by controlling the first telescopic rod mechanism 400 and the second telescopic rod mechanism 500 to operate in opposite directions, the segmented bed boards 201B are slid one by one from the main bed board 201A side to the auxiliary treatment bed board 301 side until the hollow space formed between the segmented bed boards 201B is aligned with the patient's lesion position. Then, the first telescopic rod mechanism 400 and the second telescopic rod mechanism 500 stop operating. This can create an unobstructed area at the patient's lesion site, effectively solving the problem of radiation shielding by the treatment bed board, and allowing the patient to receive a more accurate radiation dose.

[0063] As an optional implementation of this embodiment, the first telescopic rod mechanism 400 of this embodiment includes a first coupling 402, and the motor shaft of the first motor 401 and the first lead screw 403 are fixedly connected through the first coupling 402. The second telescopic rod mechanism 500 of this embodiment includes a second coupling 502, and the motor shaft of the second motor 501 and the second lead screw 503 are fixedly connected through the second coupling 502.

[0064] Specifically, see Figure 3 and Figure 4 As shown, the first telescopic rod mechanism 400 in this embodiment includes two parts, which are respectively installed on the bottom sides of the main bed board 201A. Two first lead screw nuts 601 are respectively provided on the segmented bed board 201B corresponding to the two first telescopic rod mechanisms 400. The second telescopic rod mechanism 500 includes two parts, which are respectively installed on the bottom sides of the auxiliary treatment bed 301. Two second lead screw nuts 602 are respectively provided on the segmented bed board 201B corresponding to the two second telescopic rod mechanisms 500. The distance between the two first telescopic mechanisms 400 is not equal to the distance between the two second telescopic mechanisms 500. The distance between the two first lead screw nuts 601 is equal to the distance between the two first telescopic mechanisms 400, and the distance between the two second lead screw nuts 602 is equal to the distance between the two second telescopic mechanisms 500.

[0065] In this embodiment, the main bed board 201 and the auxiliary bed board 301 are connected and supported by two first telescopic rod mechanisms 400 and two second telescopic rod mechanisms 500, which makes the support more stable and uniform, avoids deformation of the treatment bed board due to single support, and ensures accurate positioning of lesions.

[0066] In this embodiment, the main treatment bed 201, formed by the main bed board 201A and multiple segmented bed boards 201B, has a length of L0, and the total length of the multiple segmented bed boards 201B tightly joined together is L1, where L1 ≥ L0 / 2. Thus, if the patient's lesion is located in the upper body, the upper body can be placed on the segmented bed board 201B; if the lesion is located in the lower body, the lower body can be placed on the segmented bed board 201B. By controlling the first telescopic rod mechanism 400 and the second telescopic rod mechanism 500 to operate in opposite directions, the segmented bed boards 201B are slid one by one from the main bed board 201A side to the auxiliary treatment bed board 301 side, ensuring that the space between the segmented bed boards 201B is aligned with the patient's lesion position. This makes the treatment bed of this embodiment suitable for patients with lesions in any position, thus enhancing its versatility.

[0067] Further, see Figures 1-2As shown, the main treatment bed base 202 described in this embodiment is installed on the first side of the medical linear accelerator 100, and the main treatment bed base 202 can be mounted along the first direction (e.g., Figure 1 The second direction perpendicular to F1 direction (e.g.) Figure 1 The auxiliary treatment bed base 302 is installed on the second side of the medical linear accelerator 100 and can slide back and forth along the direction of the first direction (e.g., F2 direction). Figure 1 The second direction perpendicular to F1 direction (e.g.) Figure 1 (In the F2 direction) slide back and forth.

[0068] This embodiment of a medical linear accelerator treatment bed adjusts the patient's lesion to the isocentric position of the medical linear accelerator 100 by controlling the movement of the main treatment bed base 202 and the main treatment bed board 201. By controlling the movement of the auxiliary treatment bed base 302 and the auxiliary treatment bed board 301, the auxiliary treatment bed board 301 is adjusted to dock with the main treatment bed board 201, and the hollow space formed by the sliding of the segmented bed board 201B is adjusted to be relative to the position of the patient's lesion.

[0069] Specifically, the main treatment bed base 202 of this embodiment includes a main base plate 202C, a main support plate 202A, and a main support rod 202B connecting the main base plate 202C and the main support plate 202A. A first longitudinal guide rail 203 extending along a first direction is provided on the main support plate 202A, and the main bed board 201A is slidably mounted on the first longitudinal guide rail 203. The main base plate 202C is provided with a guide rail extending along the first direction (e.g., ...). Figure 1 The second direction perpendicular to F1 direction (e.g.) Figure 1 The main base plate 202C is slidably mounted on the medical electronic linear accelerator 100 via the first transverse guide rail 205 extending in the F2 direction.

[0070] Optionally, the main support rod 202B is an electric push rod that can be raised and lowered, so that the height of the main treatment bed board 201 can be adjusted, making it easier for the patient to lie flat on the main treatment bed board 201.

[0071] It should be understood by those skilled in the art that the main support rod 202B in this embodiment can also be a fixed support that cannot be raised or lowered. By setting support steps, it is convenient for the patient to lie flat on the main treatment bed board 201.

[0072] The auxiliary treatment bed base 302 described in this embodiment includes an auxiliary base plate 302C, an auxiliary support plate 302A, and an auxiliary support rod 302B connecting the auxiliary base plate 302C and the auxiliary support plate 302A. The auxiliary support plate 302A is provided with a support rod along a first direction (e.g., ...). Figure 1The second longitudinal guide rail 303 extends along the F1 direction (as shown in the image), and the auxiliary bed plate 301 is slidably mounted on the second longitudinal guide rail 303; the auxiliary bottom plate 303C is provided with a section extending along the direction (as shown in the image) along the first direction (as shown in the image). Figure 1 The second direction perpendicular to F1 direction (e.g.) Figure 1 The sub-base plate 302C is slidably mounted on the medical linear accelerator 100 via a second transverse guide rail (not shown) extending in the F2 direction.

[0073] Optionally, the auxiliary support rod 302B described in this embodiment is an electric push rod that can be raised and lowered, so that it can move synchronously with the main support rod 202B to adjust the height of the treatment bed board.

[0074] This embodiment also provides a control method for a medical linear accelerator treatment bed, characterized in that it includes:

[0075] Control the main treatment bed board and / or auxiliary treatment bed board to slide to the isocenter position of the medical electronic linear accelerator, and dock with the auxiliary treatment bed board / main treatment bed board.

[0076] Furthermore, a control method for a medical linear accelerator treatment bed according to this embodiment includes:

[0077] Controlling the movement of the main treatment bed base and the main treatment bed board adjusts the patient's lesion to the isocenter position of the medical electronic linear accelerator;

[0078] Based on the size of the patient's lesion, determine the distance S between the auxiliary treatment bed board and the main treatment bed board to ensure that the gap formed between the segmented bed boards 201B can completely cover the patient's lesion.

[0079] Control the movement of the auxiliary treatment bed base and auxiliary treatment bed board, adjust the distance between the auxiliary treatment bed board and the main treatment bed board to S, and control the second lead screw of the second telescopic rod mechanism to extend and connect with the second lead screw nut on the segmented bed board.

[0080] Based on the location of the patient's lesion, the first telescopic rod mechanism and the second telescopic rod mechanism are controlled to operate in opposite directions, and the segmented bed boards are slid one by one from the main bed board side to the auxiliary treatment bed board side until the hollow space formed between the segmented bed boards is aligned with the location of the patient's lesion. Then, the first telescopic rod mechanism and the second telescopic rod mechanism are controlled to stop operating.

[0081] Specifically, a control method for a medical linear accelerator treatment bed according to this embodiment includes:

[0082] The distance between the main treatment bed board 201 and the ground is reduced by the main support rod 202B, making it easier for patients to get on and off the main treatment bed 200. When the patient lies on the main treatment bed 200, the lesion site is positioned at the segmented bed board 201B of the main treatment bed board 201. By controlling the transverse linear motor on the main treatment bed 200 to drive the main treatment bed 200 to slide along the first transverse guide rail 205, and by controlling the longitudinal linear motor on the main treatment bed 200 to drive the main treatment bed board 201 to slide along the first longitudinal guide rail 203, and by controlling the raising and lowering of the main support rod 202B, the patient's lesion is positioned at the center of the accelerator.

[0083] By controlling the transverse linear motor on the auxiliary treatment bed 300 to drive the auxiliary treatment bed 300 to slide along the second transverse guide rail, and by controlling the longitudinal linear motor on the auxiliary treatment bed 300 to drive the auxiliary treatment bed board 301 to slide along the second longitudinal guide rail 303, and by controlling the raising and lowering of the auxiliary support rod 302B, the second lead screw 503 of the second telescopic rod mechanism 500 in the auxiliary treatment bed board 301 is aligned with the second lead screw nut 602 in the segmented bed board 201B. Controlling the second motor 501 to drive the second lead screw 503 forward, when the second lead screw 503 moves to the position of the second lead screw nut 602 in the segmented bed board 201B, the first lead screw 403 of the first telescopic rod mechanism 400 in the main bed board 201A simultaneously moves backward. At this time, the segmented bed board 201B transitions from being connected to the main bed board 201A to being connected to the auxiliary bed board 301.

[0084] Based on the position of the patient's lesion on the main treatment bed 200, the movement distance of the first lead screw 403 and the second lead screw 503 is controlled to ensure that there is no obstruction below the patient's lesion. This ensures that when the patient undergoes radiotherapy, the radiation dose will not be attenuated due to the presence of the bed board when the radiation passes through the rear and oblique rear sides of the treatment bed.

[0085] At this time, the patient is supported by the main treatment bed 200 and the auxiliary treatment bed 300, which reduces the settlement error caused by a single treatment bed supporting the patient.

[0086] It should be understood by those skilled in the art that the main treatment bed board 201 and the auxiliary treatment bed board 301 of this embodiment are equipped with lead screws for connecting the segmented bed boards. The requirements of this invention can also be achieved by using electric push rods or pneumatic push rods.

[0087] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A medical electron linear accelerator treatment couch, characterized by, The utility model relates to a medical electron linear accelerator treatment bed, comprising: a main treatment bed installed on a first side of a medical electron linear accelerator; a secondary treatment bed installed on a second side of the medical electron linear accelerator, the first side and the second side being opposite sides of the medical electron linear accelerator; the main treatment bed comprises a main treatment bed plate, and the secondary treatment bed comprises a secondary treatment bed plate, the main treatment bed plate and / or the secondary treatment bed plate being capable of reciprocating sliding along a first direction towards / away from the medical electron linear accelerator, and the main treatment bed plate and / or the secondary treatment bed plate being capable of being controlled to slide to an isocenter of the medical electron linear accelerator and being capable of being connected to the secondary treatment bed plate / main treatment bed plate in a butt joint manner; the main treatment bed comprises a main treatment bed base, and the main treatment bed plate is installed on the main treatment bed base and is capable of reciprocating sliding along the first direction, and the secondary treatment bed comprises a secondary treatment bed base, and the secondary treatment bed plate is installed on the secondary treatment bed base and is capable of reciprocating sliding along the first direction; a first telescopic rod mechanism is installed on the main treatment bed plate, and a second telescopic rod mechanism is installed on the secondary treatment bed, the main treatment bed plate and the secondary treatment bed plate being capable of being controlled to slide to the isocenter of the medical electron linear accelerator, the first telescopic rod mechanism being capable of being controlled to insert into the secondary treatment bed plate in a butt joint manner, and the second telescopic rod mechanism being capable of being controlled to insert into the main treatment bed plate in a butt joint manner; the main treatment bed plate comprises a main bed plate and a plurality of segmented bed plates, the first telescopic rod mechanism being installed at the bottom of the main bed plate and comprising a first motor and a first screw rod connected to the motor shaft of the first motor, a first screw rod nut being arranged in each of the segmented bed plates in a penetrating manner, and the first screw rod being connected to the first screw rod nuts of the plurality of segmented bed plates in a penetrating manner; the second telescopic rod mechanism comprises a second motor and a second screw rod connected to the motor shaft of the second motor, a second screw rod nut being arranged in each of the segmented bed plates in a penetrating manner; after the main treatment bed plate is controlled to slide to the isocenter of the medical electron linear accelerator, the second screw rod of the second telescopic rod mechanism is controlled to extend and butt joint with the second screw rod nut on the segmented bed plate, the first telescopic rod mechanism and the second telescopic rod mechanism being controlled to operate in a reverse direction, the segmented bed plates being sequentially slid from the main bed plate side to the secondary treatment bed plate side, until the space formed between the segmented bed plates is opposite to the position of a patient's lesion, and the first telescopic rod mechanism and the second telescopic rod mechanism stop operating.

2. The medical electron linear accelerator treatment couch of claim 1, wherein, the first telescopic rod mechanism comprises two first telescopic rod mechanisms installed on both sides of the bottom of the main bed plate, two first screw rod nuts being arranged on the segmented bed plates corresponding to the two first telescopic rod mechanisms, the second telescopic rod mechanism comprises two second telescopic rod mechanisms installed on both sides of the bottom of the secondary treatment bed, and two second screw rod nuts are arranged on the segmented bed plates corresponding to the two second telescopic rod mechanisms, the distance between the two first telescopic rod mechanisms is different from the distance between the two second telescopic rod mechanisms, the distance between the two first screw rod nuts is equal to the distance between the two first telescopic rod mechanisms, and the distance between the two second screw rod nuts is equal to the distance between the two second telescopic rod mechanisms.

3. The medical electron linear accelerator treatment couch of claim 1, wherein, The length of the main treatment bed plate assembled by the main bed plate and the plurality of segment bed plates is L0, and the total length of the plurality of segment bed plates closely assembled is L1, and L1≥L0 / 2.

4. The medical electron linear accelerator treatment couch of claim 1, wherein, The main treatment bed base is installed on the first side of the medical electron linear accelerator, and the main treatment bed base can slide back and forth in a second direction perpendicular to the first direction; the auxiliary treatment bed base is installed on the second side of the medical electron linear accelerator, and the auxiliary treatment bed base can slide back and forth in the second direction perpendicular to the first direction. The motion of the main treatment bed base and the main treatment bed plate is controlled to adjust the patient's lesion to be in the isocenter of the medical electron linear accelerator, and the motion of the auxiliary treatment bed base and the auxiliary treatment bed plate is controlled to adjust the butt joint of the auxiliary treatment bed plate and the main treatment bed plate and the spacing of the hollow space formed by the sliding of the segment bed plates relative to the position of the patient's lesion.

5. The medical electron linear accelerator treatment couch of claim 4, wherein, The main treatment bed base comprises a main base plate, a main support plate and a main support rod connecting the main base plate and the main support plate, and the main support plate is provided with a first longitudinal guide rail extending in the first direction, and the main bed plate is slidably installed on the first longitudinal guide rail. The main base plate is provided with a first transverse guide rail extending in a second direction perpendicular to the first direction, and the main base plate is slidably installed on the medical electron linear accelerator through the first transverse guide rail.

6. The medical electron linear accelerator treatment couch of claim 5, wherein, The main support rod is an electric push rod capable of lifting up and down.

7. The medical electron linear accelerator treatment couch of claim 5, wherein, The auxiliary treatment bed base comprises an auxiliary base plate, an auxiliary support plate and an auxiliary support rod connecting the auxiliary base plate and the auxiliary support plate, and the auxiliary support plate is provided with a second longitudinal guide rail extending in the first direction, and the auxiliary bed plate is slidably installed on the second longitudinal guide rail. The auxiliary base plate is provided with a second transverse guide rail extending in the second direction perpendicular to the first direction, and the auxiliary base plate is slidably installed on the medical electron linear accelerator through the second transverse guide rail.

8. The medical electron linear accelerator treatment couch of claim 7, wherein, The auxiliary support rod is an electric push rod capable of lifting up and down.

9. A method of controlling a medical electron linear accelerator treatment couch as claimed in any one of claims 1 to 8, characterized in that, It comprises: The main treatment bed plate and / or the auxiliary treatment bed plate are controlled to slide to the isocenter of the medical electron linear accelerator, and the auxiliary treatment bed plate / main treatment bed plate are butt jointed.

10. The control method of a medical electron linear accelerator treatment couch according to claim 9, wherein, It comprises: The motion of the main treatment bed base and the main treatment bed plate is controlled to adjust the patient's lesion to be in the isocenter of the medical electron linear accelerator; According to the size of the patient's lesion, the distance S between the auxiliary treatment bed plate and the main treatment bed plate is determined; The motion of the auxiliary treatment bed base and the auxiliary treatment bed plate is controlled to adjust the distance S between the auxiliary treatment bed plate and the main treatment bed plate, and the second lead screw of the second telescopic rod mechanism is controlled to extend and butt joint with the second lead screw nut on the segment bed plate; According to the position of the patient's lesion, the first telescopic rod mechanism and the second telescopic rod mechanism are controlled to operate reversely, and the segment bed plates are slid one by one from the main bed plate side to the auxiliary treatment bed plate side until the spacing of the hollow space formed between the segment bed plates is opposite to the position of the patient's lesion, and then the first telescopic rod mechanism and the second telescopic rod mechanism are controlled to stop operating.

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