Patent ID: 8178846

Claim:
A light or radiation image pickup apparatus comprising: a light or radiation detecting device having, arranged in a two-dimensional matrix form, a plurality of detecting elements for generating charge signals in response to light or radiation; a reading device for sending a switching signal to each row of the two-dimensional matrix of the light or radiation detection device for reading the charge signals; a charge-to-voltage converting device for converting the charge signals read from the light or radiation detection device on a row-by-row basis, into voltage signals on a column-by-column basis, respectively; a voltage signal holding device for sampling for a given time and holding for a predetermined time, on the column-by-column basis, the voltage signals converted by the charge-to-voltage converting device; an image processor for constructing a pickup image from the voltage signals held for the predetermined time by the voltage signal holding device; the detecting elements being divided into those arranged in a main pixel area and those arranged in a corrective pixel area within the light or radiation detection device; and a control device for performing controls to acquire corrective voltage signals by causing the voltage holding device to sample through the charge-to-voltage converting device, before the switching signal is sent, charge signals generated as different from those generated in response to the light or radiation, in a path extending from the detecting elements arranged in the corrective pixel area to the charge-to-voltage converting device, and to acquire main pixel detection signals by causing the voltage holding device to sample through the charge-to-voltage converting device, after the switching signal is sent, charge signals generated in the main pixel area; wherein the image processor forms a pickup image with time variation noises removed therefrom, using the main pixel detection signals and the corrective voltage signals.