Patent ID: 8958525
Filing Date: 2015-02-17
Classification: G01T,H04N

Abstract:
1. A radiographic imaging apparatus comprising: an x-ray radiation source for irradiating x-ray radiation onto a subject; an x-ray radiation detector having a great number of pixels each equipped with an accumulation unit for generating electric charges upon receiving the x-ray radiation and accumulating the generated electric charges and a TFT switch for reading out the electric charges accumulated in the accumulation unit, a plurality of scanning lines for turning the TFT switches ON/OFF, and a number of data lines for reading-out the electric charges accumulated in the accumulation units as image signals, a plurality of short-circuited pixels formed by short-circuiting TFT switches being arranged across the entire surface of the x-ray radiation detector; an image obtaining unit for relatively moving the x-ray radiation source with respect to the x-ray radiation detector, irradiating the x-ray radiation onto the subject at a plurality of x-ray radiation source positions associated with the movement of the x-ray radiation source, and obtaining a plurality of images corresponding to each of the plurality of x-ray radiation source positions; a short-circuited pixel setting unit for setting a position of a detection short-circuited pixel to detect a dose of the x-ray radiation corresponding to each of the plurality of x-ray radiation source positions from among the plurality of short-circuited pixels; and a dose control unit for controlling the dose of x-ray radiation output from the x-ray radiation source, based on electric signals read out from the detection short-circuited pixels, at each of the plurality of x-ray radiation source positions.