| 摘要 |
PURPOSE: To enable highly accurate and rapid measurement by a method wherein a camera partial face with which a position of a scintillation event is determined using a probability function by coarse pre-measurement is applied. CONSTITUTION: Scintillation light is distributed via a photo conductor 14 comprising a glass plate of Pyrex(R) for example to numerous photo multipliers PM1 to PMN. Corresponding electric output signals S2 to SN are used to determine an absorption Position or a position of a scintillation event. At this time, a camera face for absorbing gamma quanta and measuring their position is mainly determined by a face of a crystal 12 of scintillation. Further, unlike a camera by an analog gravity center position measurement method, the Photo conductor 14 and the pliers PM1 to PMN do not Protrude from a rim of the crystal 12 due to a digital position measurement method. Therefore, a module of a gamma camera having a substantially arbitrary geometric shape can be constituted.
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