Collimator replacing device and use method thereof

Abstract

The invention discloses a collimator replacing device. The device comprises a particle beam emitting device, a collimator library, a driving shaft, a rotary driving device and a movable driving device; the collimator library is fixedly connected with the driving shaft, and the rotary driving device drives the driving shaft to rotate around the central axis of the driving shaft; the movable drivingdevice drives the driving shaft to move in the central axis direction of the driving shaft, and a plurality of collimator mounting parts are arranged on the collimator library; a patient collimator is detachably arranged on the corresponding collimator mounting part, and the distances between the collimator mountings part and the central axis of the driving shaft are equal; the patient collimatoris matched with the outlet end of the particle beam emitting device. The device is simple in structure, convenient to use and low in cost; an opening in the collimator, namely the edge of a block aperture margin, is a curve, is smoother and closer to the shape of a tumor; radiation leakage is reduced, and the treatment effect is good. The invention further discloses a method using the collimatorreplacing device. The method is easy to operate, can achieve automatic replacement of the collimator, and is high in automation degree and convenient to use.

Description

technical field [0001] The invention relates to the field of radiotherapy, in particular to a collimator replacement device and a method for using the same. Background technique [0002] In the field of radiotherapy, one of the goals that the medical community has been pursuing is to minimize the damage to normal tissues and increase the dose to the target area of ​​the lesion as much as possible. At present, the collimator used in the particle irradiation system is often a multi-leaf collimator. Using a multi-leaf collimator for conformity does not require changing the collimator, and some effects can also be obtained, but there are still some defects in the use of a multi-leaf collimator. : The multi-leaf collimator needs at least one driving device and position detection device for each page, the structure is complex and the cost is high; the control requires high precision; multiple pages are required to cooperate to form the approximate shape of the planar tumor project...

AI Technical Summary

Problems solved by technology

At present, the collimator used in the particle irradiation system is often a multi-leaf collimator. Using a multi-leaf collimator for conformity does not require changing the collimator, and some effects can also be obtained, but there are still some defects in the use of a multi-leaf collimator. : The multi-leaf collimator needs at least one driving device and position detection device for each page, the structure is complex and the cost is high; the control requires high precision; multiple pages are required to cooperate to form the approximate shape of the planar tumor projection with a stepped boundary, and the boundary is not enough Smooth, jagged edges of conformal field for increased shot through

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