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Multi-blade collimator blade zero calibration device

A technology of multi-leaf collimator and calibration device, which is applied in the direction of X-ray/γ-ray/particle irradiation therapy, etc. It can solve the problem that the accuracy of positioning and repeatability has a great impact on the accuracy of radiation therapy, and the accuracy of photoelectric switches and the attenuation speed are inconsistent. , increasing consistency errors and other issues, to achieve the effect of eliminating device errors, eliminating detection errors, and reducing detection errors

Active Publication Date: 2021-04-16
江苏海明医疗器械有限公司
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Problems solved by technology

The position of the leaves and the consistency of repeatability have a great influence on the accuracy of radiotherapy. Usually, multiple photoelectric switches are used to calibrate the zero positions of multiple leaves, and then the position of each leaf is sampled through the photoelectric encoder, which increases the number of photoelectric switches. The position sampling consistency error, and the inconsistency of the precision and attenuation speed of each photoelectric switch also introduces positioning errors

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  • Multi-blade collimator blade zero calibration device

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Embodiment Construction

[0019] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0020] as attached figure 1 As shown, the present invention provides a blade zero position calibration device of a multi-leaf collimator, which includes a multi-leaf collimator base 1, a photoelectric switch assembly, an optical path collimation assembly, a blade assembly and a blade drive control assembly.

[0021] Wherein, the multi-leaf collimator base 1 is a structural part connecting other components;

[0022] The photoelectric switch assembly includes a photoelectric transmitter 7, a photoelectric receiver 10 and a photoelectric detection circuit 11;

[0023] The optical path collimation assembly includes a collimation guide rail 8 and a plurality of collimation shading sheets 9;

[0024] The blade assembly includes an upper blade guide rail 4, a lower blade guide rail 3, a plurality of blades 5 and a limit shading sheet 6;

[0025] The blade driv...

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Abstract

The invention discloses a multi-blade collimator blade zero calibration device. The device comprises a photoelectric switch assembly, a light path collimation assembly, a blade assembly and a blade driving control assembly which are installed on a multi-blade collimator base. The photoelectric switch assembly is used for forming a detection light beam and feeding back a calibration signal to the driving control assembly; the light path collimation assembly is used for ensuring that the divergence error of the detection light beam in the detection range meets the positioning precision requirement; and a plurality of blades in the blade assembly are respectively driven by the blade driving control assembly to move to the detection light beam for zero calibration. According to the invention, the optical path of one photoelectric switch is segmented and collimated through the light path collimation assembly, trigger errors of different positions of the optical path of the photoelectric switch caused by long-distance transmission scattering are eliminated, the zero consistency of each blade of a multi-leaf collimator is improved, and zero errors caused by inconsistency of the trigger precision and attenuation speed of multiple photoelectric switches are eliminated at the same time.

Description

technical field [0001] The invention relates to the technical field of radiotherapy instruments, in particular to a blade zero position calibration device of a multi-leaf collimator. Background technique [0002] According to the projection shape of the tumor under a certain radiation angle, the multi-leaf collimator forms a polygon close to the projection shape of the tumor through the movement of multiple leaves, so as to complete the conformal radiation therapy. The position of the leaves and the consistency of repeatability have a great influence on the accuracy of radiotherapy. Usually, multiple photoelectric switches are used to calibrate the zero positions of multiple leaves, and then the position of each leaf is sampled through the photoelectric encoder, which increases the number of photoelectric switches. The position sampling consistency error, and the inconsistency of the precision and attenuation speed of each photoelectric switch also introduce positioning erro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
Inventor 沙福泰吴建兴朱宜生陈竟飞陈璞吴君军柘江
Owner 江苏海明医疗器械有限公司
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