期刊
IEEE TRANSACTIONS ON MEDICAL IMAGING
卷 42, 期 11, 页码 3283-3294出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMI.2023.3280217
关键词
Computed tomography; Image reconstruction; Training; Deep learning; Self-supervised learning; X-ray imaging; Supervised learning; Guided filtering; computed tomography imaging; deep learning; structure transfer
This paper introduces a novel Unsharp Structure Guided Filtering (USGF) method for reconstructing high-quality CT images directly from low-dose projections without clean references. Experimental results demonstrate that USGF achieves superior performance in terms of noise suppression and edge preservation.
Low-dose computed tomography (LDCT) imaging faces great challenges. Although supervised learning has revealed great potential, it requires sufficient and high-quality references for network training. Therefore, existing deep learning methods have been sparingly applied in clinical practice. To this end, this paper presents a novel Unsharp Structure Guided Filtering (USGF) method, which can reconstruct high-quality CT images directly from low-dose projections without clean references. Specifically, we first employ low-pass filters to estimate the structure priors from the input LDCT images. Then, inspired by classical structure transfer techniques, deep convolutional networks are adopted to implement our imaging method which combines guided filtering and structure transfer. Finally, the structure priors serve as the guidance images to alleviate over-smoothing, as they can transfer specific structural characteristics to the generated images. Furthermore, we incorporate traditional FBP algorithms into self-supervised training to enable the transformation of projection domain data to the image domain. Extensive comparisons and analyses on three datasets demonstrate that the proposed USGF has achieved superior performance in terms of noise suppression and edge preservation, and could have a significant impact on LDCT imaging in the future.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据