Compact CT detector image reconstruction method and device and storage medium

Abstract

The invention discloses a compact CT detector image reconstruction method and device and a storage medium, and the method comprises the steps: carrying out the circular scanning or spiral scanning of a to-be-detected object on a sickbed through a compact detector to obtain initial projection data; rearranging the initial projection data for sampling by a traditional detector through data rearrangement; carrying out weighting processing on the rearranged projection data; filtering the weighted projection data subjected to the weighting processing; and performing weighted back projection on the filtered projection data to obtain a reconstructed image. According to the method, the initial projection data are rearranged to be sampled by a traditional detector through data rearrangement, the pre-weighting and weighted back projection weights of an original filtered back projection reconstruction algorithm are changed, and on the basis of ensuring the performance of filtered back projection high-efficiency reconstruction, artifacts are effectively inhibited, and the quality of reconstructed images is improved. According to the invention, the size of the CT mobile system is reduced, and the compact detector is popularized and applied in clinical departments and intensive care units.

Description

technical field [0001] The invention relates to the technical field of medical imaging, in particular to a compact CT detector image reconstruction method, a reconstruction device and a storage medium. Background technique [0002] The traditional fixed CT system has a large volume and is generally placed in a specific CT room and fixed on the ground, which brings great limitations to the use of the CT system. It is very dangerous to send critically ill patients to the CT room for scanning, because it is necessary to suspend the use of various important physiological monitoring and some rescue equipment when transferring the patient to the CT room, which may cause complications or aggravate the patient's condition; but If the CT scan is not performed in time, there is a danger of delaying the diagnosis. In recent years, mobile CT systems have been introduced, and the entire CT system can move autonomously, especially suitable for use in intensive care units. The mobile CT ...

AI Technical Summary

Problems solved by technology

[0004] The traditional 3D filtered back-projection reconstruction method first weights and filters the projection data, and then reweights the back-projection. Generally, it is only suitable for the mode where the detector modules are arranged along the arc with the focus of the tube as the center. It is directly used for such as image 3 The compact detectors shown or other compact configurations will produce noticeable artifacts

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