RADIATION IMAGE DETECTING DEVICE AND OPERATING METHOD THEREOF

摘要

To provide a radiation image detecting device providing high responsivity and high precision of an emission start judgment, an electronic cassette has a panel unit and a control unit. The panel unit has a two-dimensional array of normal pixels for accumulating signal charge upon receiving X-rays and detection pixels for detecting the X-rays. A signal processing circuit periodically samples a dose signal, corresponding to an X-ray dose per unit of time, from the detection pixels. An emission start judgment unit performs based on the dose signals of the detection pixels a first judgment process for judging whether X-ray emission has been started, and a second judgment process for judging whether a result of the first judgment process is correct. The control unit sets a second sampling cycle SP2 used in the second judgment process longer than a first sampling cycle SP1 used in the first sampling process.

主权项

1. A radiation image detecting device comprising:
a radiation detector for detecting a radiation; and an emission start judgment unit for performing a first judgment process for judging whether or not radiation emission has been started based on a level of a dose signal outputted from the radiation detector, and for making the radiation detector perform an accumulation operation of a signal charge and performing a second judgment process after performing the first judgment process, the second judgment process judging whether or not a result of the first judgment process is correct based on the level of the dose signal, a signal value of the dose signal in the second judgment process being larger than that in the first judgment process, wherein the accumulation operation is continued in case where the second judgment process judges that the result of the first judgment process is correct.