Previous Unenhanced Normal-Dose Scan Induced Low-Dose CT Angiography Image Restoration:Initial Study
Cardiovascular CT angiography (CTA) has been widely used for ruling out significant coronary artery stenoses in selected populations.However,the associated high X-ray radiation dose in CTA imaging has caused a significant concern in CT fields.In this paper,in order to reduce the radiation dose in CTA imaging,the normal-dose scan induced nonlocal means (ndiNLM) method was adapted for low-mAs scanned CTA image restoration.Specifically,the ndiNLM exploits the redundancy of information in the unenhanced normal-dose scan by optimizing the non-local weight in the nonlocal means (NLM) filtering strategy.Qualitative and quantitative evaluations were carried out on clinical CTA scans in terms of accuracy and resolution properties.Compared with the original NLM filtering,the evaluations clearly demonstrate that the ndiNLM method achieves higher accuracy and lower noise,while well preserving the diagnostic structures.
CT angiography low-dose unenhanced normaldose ndiNLM image restoration
Y. Zhang J. Ma H. Zhang J. Huang Z. Bian Y. Gao D. Zeng Z. Liang W. Chen
Department of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong 510515, Chin Department of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong 510515, Chin Department of Radiology, State University of New York, Stony Brook, NY 11794, USA
国际会议
World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))
北京
英文
835-837
2012-05-26（万方平台首次上网日期，不代表论文的发表时间）