JPH0286568U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams showing the relationship between the target and the electron beam in the case of electron beam irradiation and X-ray irradiation, respectively. Figures 4 and 5
The figures are a flowchart when selecting X-rays and a flowchart when selecting electron beams in the embodiment shown in FIG. 1, respectively. DESCRIPTION OF SYMBOLS 1...Accelerator, 2...Target, 3...Target drive circuit, 4...Target position detector,
5...Controller.

Claims (1)

[Scope of utility model registration request] It includes an accelerator that accelerates an electron beam, and a movable target made of heavy metal that converts the electron beam accelerated by the accelerator into X-rays, and by moving the movable target in and out of the path of the electron beam, A therapeutic linear electron accelerator capable of emitting two types of radiation, including a target position detector for detecting the position of the movable target, and a target drive circuit for driving the movable target to move it into and out of the trajectory of the electron beam. A signal for driving the target according to a preset radiation type is output to the target driving circuit, and the target position detector detects whether the movable target is at the position to be set according to the selected radiation type. When at least one of the following occurs, as determined by the signal, the selected radiation type and the target position do not match, the target position detector is malfunctioning, and the target drive circuit is malfunctioning. 1. A linear electron accelerator for treatment, comprising: a controller for prohibiting radiation irradiation.