Nuctech

Embodiments of the present disclosure provide a CT imaging system, which relates to the field of ray scanning technologies. The CT imaging system includes: an imaging channel for placing an object to be imaged in an imaging process; M distributed X-ray sources arranged at intervals along a circumferential direction of the imaging channel, at least one distributed X-ray source including q target spots; N detectors arranged at intervals along the circumferential direction of the imaging channel, including a first sub-detector and a second sub-detector. The CT imaging system includes a plurality of imaging components, the imaging component includes at least one distributed X-ray source and at least one first sub-detector. In the same imaging component, the distributed X-ray source and the first sub-detector are arranged face-to-face in a radial direction of the imaging channel, target spots of the distributed X-ray source and at least a part of the first sub-detector are located in a same plane perpendicular to the first direction. At least one second sub-detector is provided on at least one side of at least one distributed X-ray source in the first direction.

The present disclosure provides a method of identifying a material, including: detecting, in response to a radiation ray scanning a target object, a radiation ray signal using a plurality of detector modules (521, 1121) of a radiation detector, where the plurality of detector modules (521, 1121) are arranged at different positions and ray signal channels are independent of each other; calculating N ray indexes corresponding to a position of each of the detector modules (521, 1121) according to the radiation ray signal detected by each of the detector modules (521, 1121), where N is an integer greater than or equal to 1; and identifying a material of the target object according to index values of each of the ray indexes at different positions. The present disclosure further provides an apparatus of identifying a material. The apparatus is particularly adapted to detect backscattering rays.

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