Patent ID: 7659518
Filing Date: 2010-02-09
Classification: A61B,H04N

Abstract:
1. A light or radiation image pickup apparatus comprising (A) a plurality of detecting devices arranged in a matrix form for outputting charge signals in response to light or radiation, (B) a plurality of charge-to-voltage conversion devices the respective charge signals outputted from the plurality of detecting devices into voltage signals, (C) an A/D conversion device for receiving, sampling with predetermined timing and converting into digital voltage signals, the voltage signals converted by the plurality of charge-to-voltage conversion devices, (D) a control device for controlling the detecting devices to output the charge signals, (E) a plurality of gate lines commonly connecting the control device and the detecting devices arranged in rows, among the plurality of detecting device arranged in the matrix form, (F) a first arithmetic device for calculating a first arithmetic value by subtracting, from a main signal which is a digital voltage signal converted by the A/D conversion device immediately after the control device finishes control of the detecting devices connected to one predetermined gate line among the plurality of gate lines, a first offset signal which is a digital voltage signal converted by the A/D conversion device immediately before the control device starts the control of the detecting devices, (G) a second arithmetic device for calculating a second arithmetic value which is a difference between a second offset signal which is a digital voltage signal converted by the A/D conversion device immediately before the control device starts control of the detecting devices connected to one predetermined gate line, adjacent the gate line used in the operation in the first arithmetic device, among the plurality of gate lines, and the first offset signal used in the operation in the first arithmetic device, and (H) a correcting device for correcting the first arithmetic value calculated by the first arithmetic device, by using the second arithmetic value calculated by the second arithmetic device and corresponding to a period of the same length as a period from the first offset signal to the main signal used in the operation in the first arithmetic device.