MULTI-SPECTRAL STATIC CT APPARATUSES

摘要

Multi-spectral static CT apparatuses are disclosed. The apparatus includes a ray source in a form of multiple distributed spots, multiple columns of detectors, a data acquisition device, an article carrying and control device, and a multi-spectral projection data processing device. An object of the present disclosure is to combine static CT scanning technology with multi-spectral analysis technology. It has an advantage of a static CT system, such as high scanning speed, simple mechanic structure, and/or cost reduction due to omission of slip ring. It also can perform identification of material in an article, and can be widely applied in occasions such as safety inspection, and smuggling suppression at customs.

主权项

1. A multi-spectral static Computerized Tomography (CT) apparatus, comprising:
a conveyor mechanism configured to carry and move linearly an object under inspection; a distributed ray source comprising a plurality of ray source spots that are provided in a plane generally perpendicular to the direction of the object's movement, wherein the plurality of ray source spots at least partially surround the object, and emit X-rays toward the object; a detection device comprising a first column of detectors and a second column of detectors adjacent to the first column of detectors in the direction of the object's movement, wherein the first column of detectors comprises a plurality of detection units having a first energy response, provided in a first plane generally parallel to a plane of the distributed ray source and configured to receive X-rays penetrating the object, and wherein the second column of detectors comprises a plurality of detection units having a second energy response, provided in a second plane generally parallel to the plane of the distributed ray source and configured to receive X-rays penetrating the object; an acquisition device coupled to the detection device and configured to convert the X-rays detected by the first column of detectors into a first digital signal and the X-rays detected by the second column of detectors into a second digital signal; and a processing device coupled to the acquisition device and configured to reconstruct a CT image of the object based on the first and second digital signals.