Patent ID: 8873713
Filing Date: 2014-10-28
Classification: G01N,G01V

Abstract:
1. A radiation detection device for a foreign substance inspection using a subtraction method, which detects radiation in a first energy range and radiation in a second energy range higher than the radiation in the first energy range that are transmitted through a specimen and incident from a radiation incident direction, comprising: a first radiation detector that is positioned on the upstream side with respect to the radiation incident direction, and detects radiation in the first energy range and generates an image corresponding to an image of the radiation; a second radiation detector that is positioned on the downstream side with respect to the radiation incident direction, and detects radiation in the second energy range and generates an image corresponding to an image of the radiation; a timing control section that controls detection timings of the first radiation detector and detection timings of the second radiation detector; and an image correction section that corrects an image from the first radiation detector, wherein the first radiation detector includes a first pixel section that has a plurality of pixels arrayed along an image detection direction and acquires a first image based on an image of radiation in the first energy range, the second radiation detector includes a second pixel section that has a plurality of pixels arrayed along the image detection direction and acquires a second image based on an image of radiation in the second energy range, a first pixel width Wb the timing control section synchronizes detection timings of the second radiation detector to detection timings of the first radiation detector, and the image correction section sums Wb