[使用常规剂量扫描诱导的非局部均值算法进行低剂量CT血管造影图像恢复]
[Low-dose CT angiography image restoration using normal dose scan-induced non-local means algorithm].
作者信息
Zhang Yunwan, Liu Yang, Huang Jing, Zeng Dong, Bian Zhaoying, Zhang Hua, Ma Jianhua
机构信息
School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China.E-mail:
出版信息
Nan Fang Yi Ke Da Xue Xue Bao. 2013 Sep;33(9):1299-303.
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.
目的
在保持图像质量的同时，尽量减少心血管CT血管造影（CTA）成像的辐射剂量。
方法
为降低CTA成像中的辐射剂量，通过使用先前扫描的高质量图像，将常规剂量扫描诱导的非局部均值（ndiNLM）算法应用于低毫安秒扫描的CTA图像重建。
结果
针对模拟体模和临床CTA扫描，从准确性和分辨率特性方面进行了定性和定量评估。与原始的NLM算法相比，ndiNLM方法在抑制噪声诱导伪影和增强结构保留方面取得了显著进展。
结论
ndiNLM算法是一种在CTA成像中降低辐射剂量的潜在有用技术。
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