公开(公告)号：EP3932479A1

公开(公告)日：2022-01-05

申请号：EP19916662.0

申请日：2019-02-25

申请人： Otsuka Electronics Co., Ltd.

发明人： KAJIWARA, Shinpei ,  KIKUCHI, Fumito

IPC分类号： A61N5/06 ,  A61M1/36

摘要： There is achieved a compact photodynamic therapy device with which a light amount of a light emitting element can be correctly detected by a limited number of photodetectors. A photodynamic therapy device of this disclosure includes: a light emitting unit (112, 112) including a plurality of light sources (110) each belonging to any one of a plurality of groups; a photodetector (120X, 120Y) configured to output an electrical signal corresponding to an amount of light received from one or more of the light sources (110); a light emission control unit (160) configured to sequentially cause the plurality of light sources (110) to emit light for each group; and a computing unit (151) configured to calculate, based on a distance coefficient related to a distance between the photodetector (120X, 120Y) and one or more of the light sources (110) belonging to the each group, and on a value of the electrical signal output by the photodetector (120X, 120Y) in accordance with light emitted from the one or more of the light sources belonging to the corresponding group, a group light amount value related to a light amount of the one or more of the light sources belonging to the each group.