| 摘要 |
PROBLEM TO BE SOLVED: To accurately extract only a signal component in a dose detection pixel.SOLUTION: An electronic cassette 1 includes a dose detection pixel 60B for generating an amount of electric charge according to dose of irradiated radiation and a charge amplifier 241 for outputting an output signal which is connected to the dose detection pixel 60B via signal wiring 22 and has a signal level in accordance with an amount of accumulated electric charge. A cassette control unit 26 acquires an output value of the charge amplifier at a point of passage time of a first accumulation period t1 after electric charge generated in the dose detection pixel 60B starts to be accumulated to the charge amplifier 241 as a first detection value P, acquires an output signal of the charge amplifier 241 at a point of passage time of a second accumulation period t2 after the electric charge generated in the dose detection pixel 60B starts to be accumulated to the charge amplifier 241 as a second detection value P, and derives a differential value between the first detection value Pand the second detection value Pas a pixel value Pof the dose detection pixel 60B. |
