发明名称 |
Radiographic image detecting apparatus and radiographic image capturing system |
摘要 |
A radiographic image detecting apparatus and a radiographic image capturing system are provided. The radiographic image detecting apparatus includes photoelectric conversion elements for generating electric charge by emission of radiation, a bias line through which a bias voltage is supplied to the photoelectric conversion elements, a power supply for applying the bias voltage to the photoelectric conversion elements through the bias line, a current detector for detecting a bias current flowing through the bias line based on a voltage drop across a resistor inserted in the bias line, a first amplifying circuit, a second amplifying circuit connected to an output of the first amplifying circuit, and a controller for correcting the electric signal by increasing a gain of the second amplifying circuit depending on decrease in a sensitivity of the photoelectric conversion element, the decrease being caused by the voltage drop. |
申请公布号 |
US8872118(B2) |
申请公布日期 |
2014.10.28 |
申请号 |
US201113302699 |
申请日期 |
2011.11.22 |
申请人 |
FUJIFILM Corporation |
发明人 |
Nishino Naoyuki;Iwakiri Naoto |
分类号 |
H01L27/146;H04N5/32 |
主分类号 |
H01L27/146 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. A radiographic image detecting apparatus comprising:
a plurality of photoelectric conversion elements for generating electric charge by emission of radiation; a bias line through which a bias voltage is supplied to the photoelectric conversion elements; a power supply for applying the bias voltage to the photoelectric conversion elements through the bias line; a current detector for detecting a bias current flowing through the bias line based on a voltage drop across a resistor inserted in the bias line; a first amplifying circuit having a gain, wherein in a case where an electric signal due to the electric charge is read out from the photoelectric conversion elements through a signal line, the gain at a time of reading out the electric signal is set based on a current value detected by the current detector at a time of emission of the radiation; a second amplifying circuit connected to an output of the first amplifying circuit; and a controller for correcting the electric signal by increasing a gain of the second amplifying circuit depending on decrease in a sensitivity of the photoelectric conversion element due to the voltage drop. |
地址 |
Tokyo JP |