Radiation detection device, radiation image acquiring system, radiation inspection system, and radiation detection method

A radiation inspection system that irradiates radiation to a subject from a radiation source, and detects radiation in a plurality of energy ranges transmitted through the subject to inspect the subject, comprising:

• a radiation irradiator that irradiates, as the radiation source, radiation to the subject;
• a first detector that detects radiation in a first energy range that is transmitted through the subject to generate first radiation image data;
• a second detector arranged in parallel to the first detector with a predetermined region sandwiched therebetween, which detects radiation in a second energy range that is transmitted through the subject to generate second radiation image data;
• a conveying section that conveys the subject in a direction perpendicular to an irradiation direction of the radiation by the radiation irradiator;
• a timing control section that controls detection timing of at least the second detector, based on a width of the predetermined region and a conveying speed of the subject by the conveying section, so that first radiation image data to be generated by the first detector and second radiation image data to be generated by the second detector mutually correspond when detecting radiation transmitted through the subject that is conveyed by the conveying section by the first detector and the second detector;
• a composite image generating section that generates a composite image by synthesizing first radiation image data generated by the first detector and second radiation image data generated by the second detector while being controlled by the timing control section so as to mutually correspond;
• and
• a composite image output section that outputs the composite image generated by the composite image generating section,
• wherein the timing control section controls detection timing of at least the second detector, based on a magnification ratio being a ratio of a distance between the radiation irradiator and the subject to a distance between the radiation irradiator and the first detector or the second detector, besides the width of the predetermined region and the conveying speed.

A radiation inspection method in a radiation detection device including a radiation source that irradiates radiation to a subject, a first detector that detects radiation in a first energy range, a second detector arranged in parallel to the first detector with a predetermined region sandwiched therebetween, which detects radiation in a second energy range, and a timing control section that controls detection timing of radiation in the first detector and the second detector, the method comprising:

• irradiating radiation to the subject from the radiation source;
• detecting, by the first detector, radiation in a first energy range irradiated in the irradiating and transmitted through the subject to generate first radiation image data;
• detecting, by the second detector, radiation in a second energy range irradiated in the irradiating and transmitted through the subject to generate second radiation image data;
• and
• controlling, by the timing control section, detection timing in at least the detecting by the second detector, based on a width of the predetermined region, so that first radiation image data to be generated in the detecting by the first detector and second radiation image data to be generated in the detecting by the second detector mutually correspond,
• wherein, in the controlling, the timing control section controls the detection timing in at least the second detector, based on a magnification ratio being a ratio of a distance between the radiation source and the subject to a distance between the radiation source and the first detector or the second detector, and a conveying speed at which the subject passes through the predetermined region.