Low-dose CT angiography image restoration using normal dose scan-induced non-local means algorithm
10.3969/j.issn.1673-4254.2013.09.09
- VernacularTitle:正常剂量扫描导引的低剂量心血管CT造影图像恢复
- Author:
Yunwan ZHANG
1
;
Yang LIU
;
Jing HUANG
;
Dong ZENG
;
Zhaoying BIAN
;
Hua ZHANG
;
Jianhua MA
Author Information
1. 南方医科大学生物医学工程学院
- Keywords:
cardiovascular CT angiography;
low-dose;
normal-dose scan;
normal-dose scan induced non-local means;
image restoration
- From:
Journal of Southern Medical University
2013;(9):1299-1303
- CountryChina
- Language:Chinese
-
Abstract:
Objective To minimize of the radiation dose of cardiovascular CT angiography (CTA) imaging while preserving the image quality. Methods To reduce the radiation dose in CTA imaging, the normal-dose scan induced non-local means (ndiNLM) algorithm was adapted for low-mAs scanned CTA image restoration by using the previous scanned high-quality image. Results Qualitative and quantitative evaluations were carried out on both simulated phantom and clinical CTA scans in terms of accuracy and resolution properties. Compared to the original NLM algorithm, the ndiNLM method could achieve noticeable gains in terms of noise-induced artifacts suppression and enhanced structure preservation. Conclusion The ndiNLM algorithm is a potential useful technique to reduce the radiation dose in CTA imaging.
