Patent ID: 7880145
Filing Date: 2011-02-01
Classification: H04N

Abstract:
1. A radiation imaging apparatus comprising: a conversion unit having a pixel region in which a plurality of pixels are arranged in a matrix, wherein the pixel includes a conversion element converting radiation into an electric charge and a switch element outputting an electric signal based on the electric charge, and a signal wiring connected to the plurality of switching elements arranged along a column; a capacitor element arranged outside of the pixel region; a reading out circuit unit connected to the signal wiring and the capacitor element for reading out the electric signals from the pixels row by row, wherein the reading out circuit unit reads out, in parallel, a signal from the capacitor element and the electric signal from the pixel, and wherein the reading out circuit unit includes a first operation amplifier arranged for the signal wiring and a second operation amplifier connected electrically to the capacitor element, and wherein the read out circuit unit samples and holds signals from the first and second operation amplifiers in parallel; and a correction unit for correcting a signal from the first operation amplifier based on a signal from the second operation amplifier.