Patent ID: 9146326
Filing Date: 2015-09-29
Classification: G01T,H04N

Abstract:
1. A radiographic image detector for detecting a radiographic image from radioactive rays projected from a radiation source, the radiographic image detector comprising: an imaging device having pixels arrayed in a matrix, each pixel generating an electric signal corresponding to the amount of radioactive ray incident on the pixel; a measuring device measuring radiation intensity that represents radiation dose per unit time of the incident radioactive rays; a detection device detecting an end of radiation from the radiation source on determining that the measured radiation intensity began to decrease; a timing device for deciding reading start time to start a reading operation for reading out the electric signals from the pixels as radiographic image data such that an interval between detection of the end of radiation and start of the reading operation is variable, on the basis of a gradient of a declivity in time curve of the radiation intensity decreasing in the end of radiation; and a control device for controlling the imaging device to stop accumulating the electric signals and start the reading operation at the reading start time decided by the timing device after the end of radiation is detected by the detection device.