Patent ID: 7663120
Filing Date: 2010-02-16
Classification: G01T

Abstract:
1. A radiation detector which detects radiation that was irradiated onto a specimen and passed through the specimen by discriminating it by a plurality of energy regions, comprising: a radiation detecting section which generates output signals corresponding to energy of incident radiation; and a signal processing section which discriminates the output signals by first through N-th signal discrimination thresholds corresponding to N (N: integer of 1 or more) energy values for dividing the plurality of energy regions, and acquires regional counts as radiation counts per a predetermined time in the plurality of energy regions by counting the discriminated output signals, wherein when radiation which is to be irradiated onto the specimen and before passing through the specimen is defined as reference radiation, the first through N-th signal discrimination thresholds are set so that reference regional counts as the regional counts in the plurality of energy regions when the radiation detecting section detects the reference radiation become substantially equal.