Large-momentum-acceptance superconducting rotating frame for proton therapy

A rotating frame and acceptance technology, which is applied in treatment, X-ray/γ-ray/particle irradiation therapy, radiation therapy, etc., can solve the problems of quenching and magnetic field instability, so as to reduce the weight and size of the frame and meet the requirements of Effects of Fast Pencil Beam Scanning Specifications, Aperture and Weight Optimization

CN111249633APending Publication Date: 2020-06-09HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-06-09

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Abstract

The invention discloses a large-momentum-acceptance superconducting rotating frame for proton therapy. The superconducting rotating frame comprises an energy reducer component, a first deflection superconducting magnet component, a second deflection superconducting magnet component and a treatment head component with a pen-shaped beam scanning function; the first deflection superconducting magnetcomponent and the second deflection superconducting magnet component both comprise deflection magnets and focusing magnets, and are both of symmetrical structures; each deflection magnet is a combinedsuperconducting magnet with a dipolar field and an alternating-gradient quadrupole fields; and dispersion elimination is realized in the first deflection superconducting magnet component and the second deflection superconducting magnet component separately, and the maximum value of the dispersion function is suppressed by the strong focusing characteristic of the alternating gradient quadrupole field, so that the superconducting rotating frame has large momentum acceptance. Therefore, the weight and the size of the frame are obviously reduced, and the quench problem caused by rapid magnetic field change of a superconducting magnet is avoided.
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Description

technical field

[0001] The invention belongs to the technical field of proton therapy, and more specifically relates to a high-momentum acceptance superconducting rotating frame for proton therapy. Background technique

[0002] Proton therapy is a precision radiation therapy method for cancer. Based on the proton Bragg peak dose distribution characteristics, dose control at different depths can be achieved by adjusting the energy of the proton beam. At the same time, the commonly used pencil beam scanning technology can be used to achieve transverse beam irradiation, so as to achieve accurate three-dimensional conformal radiotherapy for tumors and reduce the risk of radiation exposure. Damage to surrounding healthy tissue.

[0003] The 180-degree or 360-degree rotating gantry is the core subsystem of proton therapy, which can implement multi-irradiation radiation therapy from different angles to the lesion according to the treatment plan. At present, the rotating frame bea...

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Embodiment Construction

[0028] 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.

[0029] The present invention provides a large momentum acceptance superconducting rotating gantry for proton therapy, comprising: a degrader assembly located at the entrance of the gantry; the deflection angle is θ 1 The first deflection superconducting magnet assembly; the deflection angle is θ 2 The second deflection superconducting magnet assembly; Have the treatment head assembly 40 of penc...