Electron linear accelerator and MRI(magnetic resonance imaging)-guided X-ray radiotherapy machine

Abstract

The invention relates to an accelerator and an MRI(magnetic resonance imaging)-guided X-ray radiotherapy machine. The accelerator is provided with a magnetron, the magnetron comprises a tube core and a magnet, the magnet employs a master magnet of an MRI system, the tube core is arranged in a main magnetic field, generated by the main magnet, of the MRI system, the axial direction of the tube core is along the direction of the magnetic line of the main magnetic field; and the MRI-guided radiotherapy machine is composed of a radiotherapy machine and an online MRI device, the radiotherapy machine is provided with a linear accelerator and / or a cyclotron for acceleration of charged particles, the linear accelerator and the cyclotron are provided with a magnetron, the online MRI device is provided with a main magnet for forming an MRI main magnetic field, the tube core of the magnetron is arranged in the MRI main magnetic field, the MRI main magnetic field is taken as a constant magnetic field of the magnetron, and the linear accelerator is disposed outside the main magnet. The accelerator provided by the invention is smaller and more compact and generates higher-energy electron beams; and the radiotherapy machine is more compact and can rapidly and accurately deliver the beams to specific irradiation positions.

Description

technical field [0001] The invention relates to an accelerator and an MRI-guided radiotherapy machine, belonging to the technical field of medical devices. Background technique [0002] A magnetron is a device used to generate electromagnetic waves. Usually the die consists of two concentric metal cylinders, the central cylinder is the cathode, and the outer layer is the anode. There are a series of resonant cavities on the anode. These resonators communicate with the cavity between the two cylinders and are in a vacuum state. The entire cylinder is placed in a magnetic field, and the direction of the magnetic field is along the axis of the cylinder. When the cathode is heated, free electrons are generated near the cathode. These electrons move along the curve from the cathode to the anode under the joint action of the electric field and the magnetic field, and emit electromagnetic waves at the same time. Electromagnetic waves further interact with electrons to form a s...

AI Technical Summary

Problems solved by technology

[0007] Sydney's laboratory system adopts the design of rotating patients and treatment beds. Due to the deformation of human soft tissues, it brings greater difficulty to the positioning and tracking of tumors. In addition, due to the physical fitness of patients, it is not suitable for rotating patients in many cases. Patient is not humane to patient

[0008] It can be seen that the existing MRI-guided radiotherapy machines generally have technical problems that the movable parts are not compact enough, the tracking and positioning operation accuracy is not high during treatment, and the accelerator beam intensity is not high.

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