Collision prevention system for radiation therapy equipment

The collision avoidance system of a stereotactic radiotherapy apparatus. Anti-collision of the stereotactic radiotherapy apparatus of the present invention system, radiosurgery or stereotactic used in radiation therapy, anti-collision of the radiation treatment device including a radiation emitting unit that is mounted on the robot head and the robot head moves in the body close to the patient in the system, the distance to generate the approach distance information is provided on the outer surface of the robot head by detecting the distance from the patient sensor; And according to the received access distance information from the distance sensor, the robot head is characterized in that a control unit for controlling movement of the robot head so as to hit the patient. According to the invention, to install the distance sensor on the robot head moves in the vicinity of the patient, and by by the control and by this distance sensor to sense distance from the patient to control the movement of the robot head, the robot approaching toward the patient to determine the distance between the head and the patient in real time and can provide a collision avoidance system that can effectively prevent the robot head for applying a contact or impact to the patient.