中国医疗设备2011，Vol.26Issue(2)：21-24,41,5.DOI:10.3969/j.issn.1674-1633.2011.02.006
基于Bayesian非局部先验的低剂量X-射线CT成像
Low-dose X-ray Computed Tomography Based on Bayesian Nonlocal Prior
摘要
Abstract
Objective To reduce the radiation dose delivered to the patients during the application of computed tomography (CT). Methods CT images can be easily degraded by the quantum noise under low X-ray dose scan protocols. Statistical reconstructions outperform the traditional filtered back-projection (KBP) reconstructions by accurately modeling the scan system and the measurement statistics. This paper aims to improve the CT reconstruction using a new nonlocal prior statistical reconstruction approach. Results Compared to traditional reconstruction approaches, the proposed nonlocal prior can impose an effective regularization for reconstructions by exploiting the image global information adaptively. Conclusion Kxperimentalion validates that the proposed CT reconstructions have excellent performance with low-dose scan protocols.关键词
螺旋CT/CT成像/Bayesian/低剂量扫描分类
医药卫生引用本文复制引用
高大志,陈阳,杨刚,卢光明..基于Bayesian非局部先验的低剂量X-射线CT成像[J].中国医疗设备,2011,26(2):21-24,41,5.基金项目
国家自然科学基金(81000636)资助. （81000636）
