Pencil-shaped beam conformal intensity-modulated treatment head system and its realization method

Abstract

The invention discloses a pencil beam intensity-modulated treatment head system and a realization method thereof. The system comprises a superconducting cyclotron, an energy selecting system, a beam spot adjusting device, deflecting dipolar iron and a treatment head. The superconducting cyclotron inputs a proton beam with fixed energy and adjusts flow strength of the proton beam. The energy selecting system performs adjustment on the proton beam with the fixed energy for obtaining energy and energy dispersion for treating a tumor, and furthermore realizes vertical range adjustment of the proton beam in the tumor. The proton beam arrives at the beam spot adjusting device and dimension of the cross section of the proton beam is adjusted. The proton beam arrives at the treatment head through the deflecting dipolar iron, and lateral extension is performed on the proton beam. According to the system and the method, the proton beam passes through the treatment head, thereby reducing secondary radiation caused by nuclear collision, improving utilization rate of the proton beam in a transmission process and realizing relatively large dimension of an irradiation field. Three-dimensional intensity-modulated treatment on the whole area of the tumor can be realized through a cooperatively controlled scanning magnet, an energy selecting system and the superconducting cyclotron.

Description

technical field [0001] The invention relates to a medical treatment head, in particular to a treatment head system for irradiating proton beams to affected parts such as tumors for treatment and a realization method thereof. Background technique [0002] The protons are accelerated to about 70% of the speed of light by an accelerator, and are drawn out and injected into the human body. Before reaching the tumor lesion, the energy of the radiation is not released much, but after reaching the lesion, the radiation will release a large amount of energy instantaneously, forming an energy release track called "Bragg peak", which is conducive to the precise adjustment of the dose distribution in radiation therapy, so that the radiation can reach the tumor The surrounding normal tissue dose is minimized to maximize the therapeutic effect. The traditional scatter therapy head requires the use of scatterers, collimators, adapters, compensators, range regulators, and dose detectors i...

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Problems solved by technology

The patent application number: 201080050492.5 proposes a particle beam irradiation system and a particle beam irradiation method, which can scan particle beams at high speed without using a large-capacity scanning power supply even when the required irradiation field size is large , and the overall irradiation time of the particle ray irradiation system is short, and the modulation of the low-energy area beam and the control strategy of the intensity-modulated therapy have not yet been described.

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