RADIATION IMAGING APPARATUS, ITS DRIVE METHOD, AND PROGRAM,申请号JP20070293522-传众专利搜索

RADIATION IMAGING APPARATUS, ITS DRIVE METHOD, AND PROGRAM

申请公布号：JP2009121848(A)

申请号：JP20070293522

申请日期：2007.11.12

申请公布日期：2009.06.04

申请人：

CANON INC

发明人：TAKENAKA KATSURO;ENDO TADAO;KAMESHIMA TOSHIO;YAGI TOMOYUKI;YOKOYAMA KEIGO

分类号：G01T1/00;G01T1/20;G01T1/24;H01L31/09;H04N5/321

主分类号：G01T1/00

摘要：PROBLEM TO BE SOLVED: To provide a radiation imaging apparatus capable of improving the S/N ratio of an image to be acquired. SOLUTION: The radiation imaging apparatus has a conversion unit including a plurality of pixels arranged two dimensionally, wherein each of the pixels has a conversion element (S1-1) for converting a radiation into an electric charge in accordance with the radiation, and a switching element (T1-1) for transferring an electric signal based on the electric charge, and a drive circuit unit (106) for outputting, to the switching element, a drive signal having a voltage for turning on the switching element; a read out circuit unit (A1, CL1, 100, 101) for reading out the electric signal from the pixel; a calculation unit (103) for calculating S/N ratio of the electric signal read out by the read out circuit unit; and a changeover unit (104, 105, LUT) capable of changing the voltage of the drive signal output from the drive circuit unit according to the calculated S/N ratio. COPYRIGHT: (C)2009,JPO&INPIT