Real-time monitoring method and system for medical linear accelerator use environment

A linear accelerator, real-time monitoring technology, applied in the directions of X-ray/γ-ray/particle irradiation therapy, instruments, radiotherapy, etc., can solve the problems of changing the trajectory, weakening, interference of the radiotherapy process, etc., to reduce misjudgment and operation. The effect of simplicity and shortened judgment time

Active Publication Date: 2021-04-16
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the research and development process, the inventor found that during the radiotherapy process, the magnetic fields and radiation fields of the linear particle accelerator and MRI may overlap and interfere with each other, which will cause the linear particles to be affected by the Lorentz force and change their original trajectory. Linear particles cannot be irradiated to the tumor surface as originally planned
[0004] The prior art adopts the method of dividing the MRI magnetic field, so that linear particles pass through two gaps, reducing the influence of the MRI magnetic field on the radiation field; but this method can only weaken but not completely eliminate the influence of the MRI magnetic field; therefore, still Interfering with the radiotherapy process

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  • Real-time monitoring method and system for medical linear accelerator use environment
  • Real-time monitoring method and system for medical linear accelerator use environment
  • Real-time monitoring method and system for medical linear accelerator use environment

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Embodiment 1

[0033] In one or more embodiments, a method for real-time monitoring of the environment in which a medical linear accelerator is used is disclosed, referring to figure 1 , including the following procedures:

[0034] (1) Fluorescent labeling of alpha particles;

[0035] (2) Accelerate the radiated particles and the labeled α particles in the same magnetic field, and output them separately through the medical linear accelerator;

[0036] (3) The accelerated α particles are blocked by the fluorescent display screen; a safe area is set on the fluorescent display screen, and the number of α particles falling into the safe area is used to determine whether the change of the magnetic field has an impact on the radiation field.

[0037] Specifically, in this embodiment, the reason why α particles are selected is that their penetration effect is the worst, which can avoid harm to patients due to particle penetration.

[0038] Commonly used radiation particles include: electrons, pro...

Embodiment 2

[0046] In one or more embodiments, a real-time monitoring system for the use environment of a medical linear accelerator is disclosed, including:

[0047] Apparatus for fluorescently labeling alpha particles;

[0048] A device for separately accelerating radioactive particles and labeled alpha particles in the same magnetic field and outputting them separately through a medical linear accelerator;

[0049] A fluorescent display screen for blocking accelerated α particles, and a safe area is set on the fluorescent display screen;

[0050] A device used to determine whether changes in the magnetic field have an impact on the radiation field based on the number of alpha particles falling into the safe area.

[0051] The specific implementation manner of the above-mentioned device is implemented by the method disclosed in Embodiment 1, and details are not repeated here.

Embodiment 3

[0053] In one or more embodiments, a real-time monitoring system for the use environment of a medical linear accelerator is disclosed, referring to figure 2 ,include:

[0054] A low-energy beam transmission line LEBT, an injector, a medium-energy beam transmission line MEBT, a drift tube linear accelerator and a medical linear accelerator connected in sequence; the medical linear accelerator includes an alpha particle output terminal and a radiation particle output terminal; the alpha particle A fluorescent display screen capable of completely blocking emitted α particles is set at the output end; a safe area is set on the fluorescent display screen.

[0055] Among them, LEBT is a low-energy beam transport line for beam transport, and MEBT is a medium-energy beam transport line;

[0056] The drift tube linear accelerator includes: placing a series of metal cylindrical tubes - drift tubes in a long metal cavity. The center of the drift tubes is the beam channel, and the beam ...

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Abstract

The invention discloses a real-time monitoring method and system for the use environment of a medical linear accelerator, comprising: fluorescently marking alpha particles; accelerating the radiated particles and the marked alpha particles in the same magnetic field respectively, and outputting them separately through the medical linear accelerator; The accelerated alpha particles are blocked by a fluorescent display screen; a safe area is set on the fluorescent display screen, and whether the change of the magnetic field has an impact on the radiation field is judged by the number of the alpha particles falling into the safe area. The invention prevents the harm to the patient's physical condition caused by equipment reasons during the tumor elimination radiotherapy operation.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a method and system for real-time monitoring of the operating environment of a medical linear accelerator. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Radiation therapy is a local therapy that uses radiation to treat tumors. With the development of radiotherapy equipment, the current combination of MRI + linear particle accelerator is ideal for the treatment effect. At present, this equipment is still in clinical trials. This equipment can monitor the location and size of tumors in real time through MRI, making more accurate radiotherapy a possible. During the research and development process, the inventor found that during the radiotherapy process, the magnetic fields and radiation fields of the linear particle accelerator and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21K4/00A61N5/10
CPCA61N5/1048A61N5/1049A61N5/1077A61N2005/1055
Inventor 李玮孟祥伟袁双虎雷晟暄马志祥孙海航赵宇航
Owner SHANDONG UNIV
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