ANALYZER OF ERROR BETWEEN RADIATION IRRADIATION FIELD AND LIGHT IRRADIATION FIELD IN RADIOTHERAPY APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide means for analyzing an error between a radiation irradiation field and a light irradiation field in a radiotherapy apparatus.;SOLUTION: An error analyzer 10 includes: (1) a light receiving box 1 which is a housing formed of a front plate part 2 and a rear plate part 3 and includes a storage chamber for radiation photosensitive paper 4 between the front plate part and the rear plate part; and (2) support means 5 for supporting the light receiving box so that it can be rotated and locked at an arbitrary angle. The front plate part includes an irradiation wall part 23 made of a radiation permeable material. A light irradiation field confirmation pattern 25 is provided on the surface of the irradiation wall part, and position confirmation marker means 27 for the radiation photosensitive paper in the storage chamber is provided in the irradiation wall part.;COPYRIGHT: (C)2015,JPO&INPIT