中国临床医学影像杂志2017，Vol.28Issue(5)：341-344,4.
门脉期能谱CT技术对提高肝硬化门静脉成像质量的研究
Study on using spectral CT technology for improving imaging quality of portal venography in cirrhosis
黄瑞岁 1丁可 1尹华 1韦学 1赵沁萍 1何飞1
作者信息
- 1. 广西医科大学第三附属医院南宁市第二人民医院放射科,广西南宁530031
- 折叠
摘要
Abstract
Objective:To investigate the effect of spectral CT technology for improving imaging quality of portal venography in cirrhosis patients.Methods:42 patients with cirrhosis underwent enhanced CT scans spectral CT mode in the portal phase and conventional helical mode in other phase.The best contrast-to-noise ratio (CNR) for main portal veins,as well as the conventional polychromatic images were obtained in the portal phase,and volume rendering and maximum intensity projection were created to show the portal veins.CT value of the main portal vein,liver parenchyma and image noise were measured.Overall imaging quality were assessed by two radiologists with more than 10 years' experience of abdominal imaging diagnosis.Comparison between the two groups by using independent-samples t test.Inter-observer agreement in subjective image quality was assessed by Kappa statistics.Results:The monochromatic images at 50～53 keV were found to have the best CNR for portal veins.CT value of the main portal vein and liver parenchyma,the image noise and the CNR of optimal monchromatic images were statistically significantly higher than that of polychromatic images,respectively(P＜0.01).In the comparison of image quality,the optimal monochromatic reconstructed images (Kappa value=0.759) were higher than polychromatic reconstructed images (Kappa value=0.521).The image quality scores of two groups were 4.17±0.72 and 3.06±0.55.There were significant differences between the image quality scores of two groups (P＜0.01).Conclusion:Monochromatic images of spectral CT could improve CNR for display portal veins and improve the image quality.关键词
肝硬化/门静脉/体层摄影术,螺旋计算机Key words
Liver cirrhosis/Portal vein/Tomography, spiral computed分类
医药卫生引用本文复制引用
黄瑞岁,丁可,尹华,韦学,赵沁萍,何飞..门脉期能谱CT技术对提高肝硬化门静脉成像质量的研究[J].中国临床医学影像杂志,2017,28(5):341-344,4.
