CT imaging device and imaging method

Abstract

The invention provides a CT imaging device and imaging method. The CT imaging device comprises an X-ray source, a detector, a rotating mechanism used for connecting the X-ray source and a first guiderail used for connecting the detector, and the rotating mechanism and the first guide rail are located on the same plane. The X-ray source and the detector are oppositely arranged on the two sides ofthe rotating axis of the rotating mechanism, and the X-ray source can rotate in the circumferential direction of the rotating mechanism. The detector can slide on the first guide rail, the X-ray source takes a conical half-fan beam as an emergent light beam, the X-ray source rotates for a certain angle along the rotating mechanism, and the detector synchronously slides along the first guide rail,so that an imaging included angle alpha is formed between the center line of the emergent light beam and the first guide rail, and alpha is more than 0 degree and less than or equal to 90 degrees. Compared with the prior art, large-view wide-object imaging in a non-splicing mode can be achieved, so that artifacts are eliminated, and the X-ray dosage is reduced.

Description

technical field [0001] The invention relates to a CT imaging device and an imaging method, belonging to the field of medical imaging. Background technique [0002] CBCT (Cone Beam Computer Tomography) is a new type of CT technology that has been applied clinically since the beginning of this century. It adopts low-energy cone-beam rays, and rotates imaging around the patient's photographed part, which has the characteristics of short imaging time and low radiation dose. [0003] At present, methods commonly used in CT systems to increase the imaging field of view include multiple scans for image stitching, and methods such as offsetting the detector for imaging. However, the image stitching method is easy to produce stitching artifacts at the stitching place, which affects the imaging effect. However, the method of biasing the detector for imaging can cover the entire human body cross-section, but because the human body’s fault cross-section is wide and generally elliptica...

AI Technical Summary

Problems solved by technology

However, the image stitching method is prone to stitching artifacts at the stitching place, which affects the imaging effect

However, the method of biasing the detector for imaging can cover the entire human body cross-section, but because the human body’s fault cross-section is wide and generally elliptical, there is a gap in the imaging area outside the human body cross-section in the traditional circular large-field imaging, resulting in X-ray waste

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