Rebuilding method for 2N+1 source helical CT

Abstract

The invention discloses a reestablishing method of 2N+1 source spiral CT in the biological medical imaging technological domain, which is characterized by the following: adopting 2N+1 X-ray source and 2N+1 minimized tester window structures; scanning at 2N+1 spiral paths; improving projecting data gathering speed; reestablishing two-dimensional image under spiral PI coordination system; regenerating three-dimensional image on the rectangular coordinates system based on a series of two-dimensional images.

Description

technical field [0001] The present invention relates to a method in the technical field of biomedical imaging, specifically, a reconstruction method of 2N+1 source helical CT, especially a method for heart imaging or small animal imaging. Background technique [0002] The working process of single-source spiral CT is as follows: the X-ray tube emits cone-beam X-rays at one point, and after passing through the measured object, the attenuated X-rays are detected by the detector on the opposite side, and the X-rays are converted into electricity. The signal is sent to the computer's analog-to-digital converter and data collector, converted into a digital signal and stored in the computer. This is just one exposure and acquisition process. In order to obtain the projection data needed to reconstruct the object under test, the X-ray source and the single-row detector need to move along a spiral trajectory relative to the object under test, and complete the process at each positio...

AI Technical Summary

Problems solved by technology

However, the time for one revolution has not been shortened. For dynamic objects such as hearts and small animals, the data acquisition speed is not fast enough, and there are problems such as low quality of reconstructed images and insufficient improvement in the resolution of reconstructed images.

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