Patent ID: 9055238
Filing Date: 2015-06-09
Classification: G01T,H04N

Abstract:
1. A radiation image detecting device comprising: a panel unit having a two-dimensional array of pixels each for producing and accumulating signal charge in accordance with radiation emitted from a radiation source; a radiation detector for detecting said radiation to judge a start of radiation emission; a dose sampling unit for periodically sampling a dose signal representing a radiation dose per unit of time based on output of said radiation detector; an emission start judgment unit for sequentially performing a first judgment process and a second judgment process, said first judgment process judging whether or not said radiation emission has been started based on a level of said dose signal, said second judgment process judging whether or not a result of said first judgment process is correct based on said level of said dose signal sampled by said dose sampling unit; and a sampling cycle setting unit for setting a sampling cycle of said dose signal in said dose sampling unit, said sampling cycle setting unit setting a second sampling cycle used in said second judgment process longer than a first sampling cycle used in said first judgment process, so that a signal value of said dose signal obtained in one-time sampling in said second judgment process is higher than a signal value of said dose signal obtained in one-time sampling in said first judgment process.