Collimator positioning component and its positioning method

Abstract

The invention discloses a collimator positioning assembly, and the assembly comprises a driver; a carrier driven by the driver to operate, wherein the carrier is provided with at least two collimating positions through limiting; a position initialization assembly which is used for setting the zero position of the carrier; a coder which detects the first actual position information of the movement of the carrier relative to the zero position; a position confirmation assembly which is used for feeding back second actual position information when the carrier is located at any collimating position; a storage unit; and a controller which is used for controlling the driver to drive the carrier to move according to the first actual position information detected by the coder and first preset position information which is corresponding to to-be-located collimating position and stored by the stored unit till the first actual position information detected by the coder is consistent with the first preset position information which is corresponding to to-be-located collimating position and stored by the stored unit, and is also used for feeding back verification information according to the comparison of the second actual position information fed back by the position confirmation assembly with the second preset position information which is corresponding to to-be-located collimating position and stored by the stored unit.

Description

technical field [0001] The present invention relates to the field of medical equipment, specifically to the field of medical linear accelerators, and more specifically to a collimator positioning assembly and a positioning method used on medical linear accelerators. Background technique [0002] Accelerating tubes In medical linear accelerators, the X-rays used to treat patients need a certain degree of uniformity within the radiation field range. Uneven X-rays will increase the skin dose and cause harm to patients. However, the energy distribution of the X-rays actually produced by the medical linear accelerator is not uniform, but concentrated in a small angle range in the incident direction, which does not meet the clinical requirements for the energy distribution of the rays. Therefore, in the linear accelerator, a homogenizer is used to homogenize the generated X-rays. [0003] X-rays with different energies correspond to equalizers with different shapes. For medium-e...

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Problems solved by technology

[0004] In addition, the existing linear accelerator also has an electron therapy mode in addition to the photon therapy mode. Therefore, a homogenizer suitable for homogenizing photons is not suitable for electron therapy.

Also, typically, the electron therapy mode does not have a straightener and allows the electrons to pass directly through the collimator

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