Method for recovering and processing energy spectrum CT images

Abstract

The invention discloses a method for recovering and processing energy spectrum CT images. The method comprises the steps that low-energy CT projection data ylow and high-energy CT projection data yhigh are obtained, CT image reconstruction is respectively conducted on the low-energy CT projection data ylow and the high-energy CT projection data yhigh, and a low-energy CT image mulow and a high-energy CT image muhigh are obtained; synthesis is conducted on the low-energy CT image mulow and the high-energy CT image muhigh, so that a synthesized CT image mucom is obtained; a weighted average filter is arranged and combined with the synthesized CT image mucom to conduct weighted average filtering processing on the low-energy CT image mulow and the high-energy CT image muhigh respectively, so that a final high-energy CT image mulow (restored) and a final low-energy CT image muhigh (restored) after restoration are respectively obtained. The method can rapidly and efficiently obtain the energy spectrum CT images with high quality, low-dose sending is applied, generation of the high-quality CT images is guaranteed, and therefore the robustness is good and image noise and restraining image artifacts can be effectively eliminated.

Description

technical field [0001] The invention relates to a medical image processing technology, in particular to a restoration processing method of an energy spectrum CT image. Background technique [0002] In recent years, more and more attention has been paid to the radiation dose received by patients undergoing CT examination and the associated cancer risk. With the widespread application of spectral CT in clinical practice, the use of new CT equipment results in greater X-ray doses, making people more and more concerned about the potential harm of CT doses to the human body and how to maximize the quality of images while ensuring image quality. Minimize the use of X-ray doses. [0003] Spectral CT imaging under low-dose conditions can have clinical vitality, so we must find efficient low-dose imaging methods. At present, in terms of hardware, the efficient X-ray utilization rate of the detector, good photoelectric matching performance, and high-precision data acquisition system...

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a recovery processing method for energy spectrum CT images that is simple in calculation, fast in implementation, has good robustness, and has excellent performance in noise elimination and artifact suppression, so as to solve the existing calculation problems in energy spectrum CT image restoration. Technical problems with defects such as large volume and very long rebuild time

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