Detector module, detector and CT equipment

Abstract

The application discloses a detector module, a detector and CT equipment. The detector module is used for detecting a ray which is emitted from an X-ray source of a CT host machine and is subjected toattenuation by a scanning object. The detector module comprises a bracket and a plurality of detector submodules mounted on the bracket, wherein each detector submodule comprises a top surface for receiving rays; the top surfaces of the detector submodules are arrayed in an arc shape or in a straight line along the Z direction of a CT rotary system; the top surfaces of the detector submodules form a receiving region corresponding to an illumination region of the X-ray source in the YZ plane of the CT rotary system; the receiving region is asymmetric relative to a focus reference surface of the X-ray source; and the focus reference surface penetrates through the focus center of the X-ray source and is parallel to an XY plane of the CT rotary system. Through the adoption of the detector module disclosed by the invention, performance parameter requirements to the X-ray source, and manufacturing cost and difficulty of Z-direction large-coverage area (such as 512-layer ) CT equipment can be reduced.

Description

technical field [0001] The present application relates to the technical field of computed tomography, in particular to a detector module, a detector and CT equipment. Background technique [0002] With the development of CT (Computed Tomography, electronic computer tomography) technology, the coverage of a single scan of the human body is required to be larger and larger. Correspondingly, the number of detector layers is increasing, and more and more detectors need to be installed on the housing. At the same time as the detector sub-module, the irradiation area of ​​the X-ray source as the detector signal source is also required to be larger and larger. In this way, an X-ray source with a larger target angle has to be used to achieve a large Z-direction of the CT rotation system. Imaging coverage, however, ultimately makes CT equipment with large coverage in the Z direction difficult and expensive to manufacture. Contents of the invention [0003] In order to overcome som...

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Problems solved by technology

[0002] With the development of CT (Computed Tomography, electronic computer tomography) technology, the coverage of a single scan of the human body is required to be larger and larger. Correspondingly, the number of detector layers is increasing, and more and more detectors need to be installed on the housing. At the same time as the detector sub-module, the irradiation area of ​​the X-ray source as the detector signal source is also required to be larger and larger. In this way, an X-ray source with a larger target angle has to be used to achieve a large Z-direction of the CT rotation system. Imaging coverage, however, ultimately makes CT equipment with large coverage in the Z direction difficult and expensive to manufacture

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