北京生物医学工程2011，Vol.30Issue(5)：441-446,6.DOI:10.3969/j.issn.1002-3208.2011.05.01
一种基于压缩传感理论的CT剂量降低方法
A Compressed Sensing-Based CT Dose Reduction Method
摘要
Abstract
Objective Because the dose of CT(computed tomography) is higher than other X-ray modalities and the accumulative effect of dose results in high carcinogenic risk, dose reduction is a big challenge in the development of CT technology. Methods Currently, methods including decrease of tube current and increase of detector rows have not been efficient enough for further dose reduction. In this paper, we proposed a non-uniform self-adapting sampling method based on the X-ray attenuation. By decreasing the projection views in regions which have high tube current, the dose can be reduced. And POCS-TVM algorithm based on compressed sensing is applied to reconstructing CT image with insufficient sampling data. Results The results of experiments show that this approach can reduce the radioactive dose significantly while ensure the acceptable quality of image. Conclusions The CT Dose reduction method based on a compressed sensing can reduce the dose and guarantee the clinical diagnostic quality of the reconstructed CT image, which benefits the subjects.关键词
计算机断层成像技术/剂量/压缩传感/非均匀采样Key words
computed tomography/ dose/ compressed sensing/ non-uniform sampling引用本文复制引用
罗海,王淑影,潘文宇,周荷琴..一种基于压缩传感理论的CT剂量降低方法[J].北京生物医学工程,2011,30(5):441-446,6.基金项目
国家自然科学基金(60771007)、中国科学技术大学研究生创新基金资助 （60771007）
