Method and system for adjusting size of isocenter beam spot of rotating rack

A technology of rotating gantry and isocenter, applied in radiation therapy, X-ray/γ-ray/particle irradiation therapy, treatment, etc., can solve problems such as poor stability, and achieve the effect of avoiding system instability

Inactive Publication Date: 2018-03-27
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

This solves the technical problem of poor stability when the beam spot size is adjusted in the existing rotating gantry treatment device

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  • Method and system for adjusting size of isocenter beam spot of rotating rack
  • Method and system for adjusting size of isocenter beam spot of rotating rack

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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0027] In a proton or heavy ion therapy device, the beam is generated by an accelerator, transmitted through a transport line, and finally accurately enters human tissues and organs through a rotating frame. According to the needs of the clinical treatment end, the beam not only requires precise positioning and stable beam parameters, but also sometimes needs to change the size of the isocenter ...

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Abstract

The invention discloses a method and system for adjusting the size of an isocenter beam spot of a rotating rack. The method comprises the steps: generating a beam current through an accelerator (in amode of convolution or synchrotron), carrying out the matching transmission of the beam current of a transmission line, and obtaining the parameters of the beam current at the inlet of the rotating rack, such as the size of the beam spot and the emittance; carrying out the matching of different mirroring scales according to the clinic required size adjustment parameters of the isocenter beam spotof the rotating rack under through a transmission matrix method under the conditions that the beam current matching parameters of the transmission line end at the inlet of the rotating rack are not changed and the magnet parameters of the transmission line are not changed, and dynamically adjusting the size of the isocenter beam spot. The method is built on the basis of the beam optics and the beam transmission matrix theory, and is reliable in design. The implementation scheme exerts small requirements for the engineering implementation, and is of great significance to the stabilization of the beam in a process of proton therapy.

Description

technical field [0001] The invention belongs to the field of particle radiotherapy (proton or heavy ion) device development, and more specifically relates to a method and system for dynamically adjusting the beam spot size of the isocenter of a rotating frame according to the mirror image ratio by using transmission matrix element matching. Background technique [0002] Particle radiotherapy is the current precision radiotherapy method for cancer. Based on the unique Bragg peak dose distribution characteristics of proton or heavy ion beams, the Bragg peak dose control at different depths can be achieved by adjusting the beam energy, thereby achieving precise radiation therapy. Usually, the type of medical particle accelerator is a cyclotron or a synchrotron. The beam is generated by the accelerator and transported by the transport line, and finally the precise positioning of the beam in the human body is realized through the rotating frame. [0003] For proton therapy devic...

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Application Information

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IPC IPC(8): H05H7/00A61N5/10
CPCH05H7/001A61N5/10A61N5/103A61N5/1048H05H2007/002
Inventor 秦斌陈炜陈曲珊刘开锋杨军谭萍李冬樊宽军樊明武
Owner HUAZHONG UNIV OF SCI & TECH
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