Particle beam emission deformation collimator
By arranging multiple long shields around the particle beam emission channel and adjusting the shape of the particle beam emission port using the driving unit and the sliding unit, the problem of inaccurate irradiation caused by particle beam focal spot fixation in existing equipment is solved, and precise treatment of tumor lesions of different shapes and sizes is achieved.
Patent Information
- Application Number
- CN202422358367.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The particle beam focal spot size and shape of existing radiation therapy equipment are fixed, and cannot be accurately adjusted according to tumor lesions of different shapes and sizes, resulting in insufficient irradiation accuracy.
A plurality of long shields are arranged around the particle beam emission channel, and the shape of the particle beam emission port is changed by moving the shield, and the shape adjustment of the particle beam emission port is achieved by combining the shield driving unit and the sliding unit.
Accurate irradiation of tumor lesions of different shapes and sizes is achieved, reducing damage to irrelevant tissues, and improving the accuracy and flexibility of treatment.
Smart Images
Figure CN223248640U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a particle beam emission deformation collimator. Background Art
[0002] In the field of novel radiotherapy, such as proton therapy, heavy ion therapy, and boron neutron capture therapy, high-energy particles are generated by particle accelerators and precisely irradiated to achieve treatment. Proton therapy and heavy ion therapy utilize accelerator-generated proton and heavy ion beams, which are delivered to the patient through a beam collimator of a specified size. These beams are then transmitted to the tumor site in the body and directly bombard the tumor. Boron neutron capture therapy uses an accelerator-generated proton beam, which is then delivered to the target cavity of a radiotherapy device, producing spallation fast neutrons. These are then slowed down to epithermal neutrons by a neutron moderator core installed in the device's moderation cavity. These epithermal neutrons are then delivered to the patient through a beam collimator of a specified size. The epithermal neutrons interact with pre-injected targeted drugs to generate hot alpha particles that bombard the tumor site, thus achieving targeted therapy.
[0003] In existing technology, a single device is equipped with a fixed treatment head with a single specification and a fixed beam outlet diameter. Consequently, the size and shape of the particle beam focal spot used for treatment are fixed. This limits irradiation accuracy and flexibility for adjusting to different application requirements, making it difficult to accurately irradiate patients with tumor lesions of varying shapes and sizes. Furthermore, the size and shape of the interchangeable beam outlet are also fixed, making it impossible to select the appropriate beam outlet according to the shape and size of the patient's lesion. Utility Model Content
[0004] In view of this, the present invention provides a particle beam emission deformable collimator, which uses multiple long shielding strips to block the particle beam emission port, and adjusts the shape of the particle beam emission port by moving the long shielding strips at different positions to achieve precise irradiation of lesions of different shapes.
[0005] In order to achieve the above-mentioned purpose, the present utility model provides the following technical solutions.
[0006] 1. A particle beam emission deformable collimator includes a particle emission channel and multiple long shielding strips for adjusting the shape of the particle beam emission. The multiple long shielding strips are arranged around the particle emission channel. Each long shielding strip can move linearly and partially block the particle beam emission port of the particle emission channel. As different long shielding strips move, the shape of the particle beam emission port changes, thereby achieving precise irradiation of lesions of different shapes.
[0007] Multiple independently set long shielding strips are installed in the particle emission channel. Each long shielding strip partially blocks the particle beam emission port. As the long shielding strips move, the contour shape of the particle beam emission port changes, so as to achieve precise irradiation of patients with tumor lesions of different shapes and sizes.
[0008] 2. Based on Technical Solution 1, it also includes a shielding element drive unit, which includes a drive motor and a drive gear. The drive gear is connected to the motor shaft and rotates with the motor shaft. The long shielding element is a spur rack. The drive gear is engaged with the spur rack, and the spur rack moves linearly with the rotation of the drive gear.
[0009] 3. On the basis of Technical Solution 2, it also includes a sliding unit for propelling the shielding member drive unit to move linearly. The spur racks are divided into at least two groups, and each group of spur racks corresponds to a shielding member drive unit and a sliding unit. The spur racks in each group are arranged side by side without gaps, and the shielding member drive unit is connected to the sliding unit. The sliding unit can drive the shielding member drive unit to move or stay along the arrangement direction of the spur racks, so that the shielding member drive unit can drive any spur rack to move.
[0010] 4. Based on technical solution 3, the sliding unit includes a sliding motor, a sliding screw, a sliding nut and a linear guide. The sliding screw rotates with the motor shaft of the sliding motor. The sliding nut is threadedly connected to the sliding screw and slidingly connected to the linear guide. When the sliding screw rotates with the motor shaft of the sliding motor, the sliding nut moves in a straight line, and the sliding nut drives the shielding component drive unit to move or stay along the arrangement direction of the spur rack. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The schematic diagram of the structure of the particle beam emission deformation collimator of the present invention is provided.
[0012] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.
[0013] Figure 3 This is a schematic diagram of the state in which two sets of spur racks close the particle emission channel in this embodiment.
[0014] Figure 4 This is a schematic diagram of the state in which the particle emission channel is opened in this embodiment.
[0015] The reference numerals are: particle emission channel 1; long shielding member 2; support disk 3; shielding member driving unit 4; driving motor 41; driving gear 42; support base 43; sliding unit 5; sliding motor 51; sliding screw 52; sliding nut 53; linear guide rail 54. DETAILED DESCRIPTION
[0016] The present invention will be described in detail below with reference to specific embodiments.
[0017] Particle beams are used to treat cancer patients' tumor lesions. They are radioactive and can cause unnecessary damage if they irradiate unrelated tissue. Therefore, during radiation therapy, the particle beam must be precisely directed to the patient's lesion, ensuring that the beam completely covers the tumor area, avoiding missed areas and ensuring the accuracy and effectiveness of the treatment.
[0018] like Figures 1 to 4 As shown, this embodiment provides a particle beam emission deformation collimator, comprising a particle emission channel 1, multiple elongated shielding members 2 for adjusting the particle beam emission shape, and a support disk 3. The inlet of the particle generator is connected to the particle shaping cavity. The generated particles enter the particle shaping cavity and are decelerated. The particle emission channel 1 is mounted at the end of the particle shaping cavity. The particle beam in the particle shaping cavity is emitted from the particle beam emission port of the particle emission channel 1. The support disk 3 is mounted on the particle emission channel 1 to support the elongated shielding members 2. The sidewall of the particle emission channel 1 is provided with a strip-shaped shuttle opening along the circumference. Multiple elongated shielding members 2 are arranged around the particle emission channel 1. One end of each elongated shielding member 2 passes through the strip-shaped shuttle opening of the particle emission channel 1 and can move linearly to partially block the particle beam emission port of the particle emission channel 1. As different elongated shielding members 2 move, the shape of the particle beam emission port changes, enabling precise irradiation of lesions of different shapes. In this embodiment, a plurality of independently arranged long shielding members 2 are installed in the particle emission channel 1. The long shielding members 2 are limited by the strip shuttle port to prevent them from falling due to gravity; each long shielding member 2 partially blocks the particle beam emission port. As the long shielding member 2 moves, the contour shape of the particle beam emission port changes, so as to achieve precise irradiation of patients with tumor lesions of different shapes and sizes, avoid missed irradiation, and minimize the neutron beam irradiation of irrelevant tissues to cause unnecessary damage.
[0019] like Figures 1 to 4As shown, the particle beam emission deformation collimator also includes a shield drive unit 4, which is mounted above the elongated shield 2. The shield drive unit 4 includes a drive motor 41 and a drive gear 42. The drive gear 42 is connected to the motor shaft and rotates with the motor shaft. The elongated shield 2 is a spur rack, and the drive gear 42 meshes with the spur rack. The spur rack moves linearly with the rotation of the drive gear 42. In this embodiment, when the shape of the particle beam emission port needs to be adjusted, the drive motor 41 is started, and the drive gear 42 rotates with the motor shaft, driving the corresponding elongated shield 2 to move, thereby changing the length of the elongated shield 2 extending into the particle emission channel 1 and changing the shape of the particle beam emission port. In addition, the spur rack is controlled by a motor and supports remote operation, which can improve the degree of automation. The operator will not be exposed to the radioactive particle beam, thereby improving operational safety.
[0020] Since there are a large number of spur racks, if each spur rack is equipped with a motor drive, the structure will be more complicated and the operation will be more troublesome.
[0021] For this reason, Figures 1 to 4 As shown, this embodiment also includes a sliding unit 5 for propelling the shielding member driving unit 4 to move linearly, and the spur racks are divided into two groups, and the spur racks in each group are arranged side by side without gaps to avoid affecting the shape of the particle beam emission port; the two groups of spur racks are symmetrically arranged on both sides of the particle emission channel 1, and accordingly, there are two strip shuttle openings on the particle emission channel 1, and the two groups of spur racks pass through the corresponding strip shuttle openings; each group of spur racks corresponds to a shielding member driving unit 4 and a sliding unit 5; the shielding member driving unit 4 also includes a support base 43, the support base 43 spans each group of spur racks and is installed on the support disc 3, an opening is opened on the support base 43, a drive motor 41 is installed on the support base 43, and a drive gear 42 partially passes through the opening on the support base 43 and engages with the spur rack; the support base 43 is connected to the sliding unit 5, and the sliding unit 5 can drive the shielding member driving unit 4 to move along the arrangement direction of the spur racks, so that the shielding member driving unit 4 can drive any spur rack to move. This design can reduce the use of drive motors 41. Each set of spur racks is equipped with a drive motor 41. The movement of each spur rack can be achieved by simply changing the position of the drive motor 41. Figure 3 When the ends of the two sets of spur racks in the particle emission channel 1 are all in contact, the two sets of spur racks close the particle beam emission port. Figure 4 When some of the straight racks in the two groups move outward, the particle beam emission port opens and the shape can be changed according to the length of the straight racks moving outward.
[0022] like Figures 1 to 4As shown, the sliding unit 5 includes a sliding motor 51, a sliding screw 52, a sliding nut 53 and a linear guide 54. The sliding screw 52 rotates with the motor shaft of the sliding motor 51, and the sliding nut 53 is threadedly connected to the sliding screw 52 and is slidingly connected to the linear guide 54; when the sliding screw 52 rotates with the motor shaft of the sliding motor 51, the sliding nut 53 moves in a straight line, and the sliding nut 53 drives the support base 43 to move along the arrangement direction of the spur rack, and the support base 43 drives the driving motor 41 and the driving gear 42 to move to the position of the spur rack to be driven. At this time, the sliding motor 51 stops driving, and the driving gear 42 is just engaged with the spur rack to be driven, thereby realizing the driving of the spur rack.
[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A particle beam emission deformable collimator, characterized by: It includes a particle emission channel and multiple long shielding strips for adjusting the shape of particle beam emission. The multiple long shielding strips are arranged around the particle emission channel. Each long shielding strip can move linearly and partially block the particle beam emission port of the particle emission channel. As different long shielding strips move, the shape of the particle beam emission port changes to achieve precise irradiation of lesions of different shapes.
2. The particle beam emission deformation collimator according to claim 1, characterized in that: It also includes a shielding member drive unit, which includes a drive motor and a drive gear. The drive gear is connected to the motor shaft and rotates with the motor shaft. The long shielding member is a spur rack. The drive gear is engaged with the spur rack. The spur rack moves linearly with the rotation of the drive gear.
3. The particle beam emission deformation collimator according to claim 2, characterized in that: It also includes a sliding unit for propelling the shielding member drive unit to move linearly. The spur racks are divided into at least two groups, and each group of spur racks corresponds to a shielding member drive unit and a sliding unit. The spur racks in each group are arranged side by side without gaps, and the shielding member drive unit is connected to the sliding unit. The sliding unit can drive the shielding member drive unit to move or stay along the arrangement direction of the spur racks, so that the shielding member drive unit can drive any spur rack to move.
4. The particle beam emission deformation collimator according to claim 3, characterized in that: The sliding unit includes a sliding motor, a sliding screw, a sliding nut and a linear guide. The sliding screw rotates with the motor shaft of the sliding motor. The sliding nut is threadedly connected to the sliding screw and slidingly connected to the linear guide. When the sliding screw rotates with the motor shaft of the sliding motor, the sliding nut moves in a straight line, and the sliding nut drives the shielding component drive unit to move or stay along the arrangement direction of the spur rack.