Patent ID: 7075090
Filing Date: 2006-07-11
Classification: G01N

Abstract:
1. A radiological imaging apparatus for forming X-ray images, comprising: a radiation detection unit composed of a plurality of photoelectric converters arrayed in a matrix-like formation, configured to detect and convert radiation from an irradiated subject into electrical signals; a drive control unit operatively connected to said radiation detection unit, configured to control movement of said radiation detection unit; and a read-out unit operatively connected to said radiation detection unit, configured to read the electrical signals output by said radiation detection unit, said read-out unit comprising: a first amplifier unit with variable gain; a control unit, configured to control the gain of said first amplifier unit; a sample-hold unit disposed downstream of said first amplifier unit, configured to hold a signal amplified by said first amplifier; a multiplexer disposed downstream of said sample-hold unit, configured to convert parallel signals output from said sample-hold unit into a serial signal; and a second amplifier unit disposed downstream of said multiplexer; wherein a frequency band of said first amplifier unit is narrower than that of said second amplifier unit, and a gain Gf of said first amplifier unit for a moving-picture mode is set to be greater than a gain Gs of said first amplifier unit for a still-picture mode by said control unit.