| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable emission intensity of each scintillator crystal to be detected by using light-sensitive elements whose number is less than that of scintillator crystals, by overcoming the limit of detectability due to existence of non-sensitive regions inherent in the light-sensitive elements. <P>SOLUTION: A radiation detector includes: a polyhedral scintillator block composed of a plurality of scintillators arranged thereon; and the light-sensitive elements for receiving light emitted from the scintillators caused by incidence of radiation through the scintillators where optical coupling is carried out. In a method for detecting a radiation position, which employs the radiation detector and detects a position of a light-emitting scintillator and energy of absorbed radiation, two or more groups of light-sensitive elements each having the non-sensitive region in at least one surface and coupling optically with different scintillators, are disposed at both edges of a channel passing through the plurality of scintillators, and reflectivity and transmissivity of light at border and peripheral planes of respective scintillators are adjusted, thereby controlling respective groups of light-sensitive elements in allocation of light-receiving amount. <P>COPYRIGHT: (C)2007,JPO&INPIT |
