Patent ID: 9188685
Filing Date: 2015-11-17
Classification: A61N,G01T

Abstract:
1. A radiation detector comprising: a sensor section having radiation sensors stacked on one another; a dummy absorber with a water-equivalent thickness equal to an average water-equivalent thickness of the stacked radiation sensors; a dummy absorber driving control section configured to place the dummy absorber at an anterior position in a direction of measurement by the sensor section, with the anterior position corresponding to a position at the line where radiation propagates; a sensor section driving control device configured to move the sensor section through a distance equal to average thickness of the stacked radiation sensors, at the line where the radiation propagates; and a signal-processing unit for calculating calibration coefficients for each radiation sensor, from measurement results output from the radiation detector when the dummy absorber is placed at the anterior position, measurement results output from the radiation detector when the dummy absorber is not placed at the anterior position, and an integrated extraction dose value of the radiation extracted during acquisition of the two sets of measurement results.