中国医疗设备2016，Vol.31Issue(7)：12-15,4.DOI:10.3969/j.issn.1674-1633.2016.07.004
冠脉追踪技术结合单能量成像去运动伪影的临床应用
Clinical Application of Gemstone Spectral CT Snapshot Freeze Motion Correction Algorithmon Optimal Monochromatic Energy Levelin Coronary Angiography
高剑波 1蒋耀军 1刘杰 1吴艳 1侯平 1查开继1
作者信息
- 1. 郑州大学第一附属医院放射科，河南郑州450052
- 折叠
摘要
Abstract
Objective To investigate the effect of application of snapshot freeze (SSF) motion correction algorithm on the image quality of coronary CT angiography (CCTA) on optimal monochromatic energy level. Methods Thirty consecutive patients who underwent coronary CTA without heart rate control were selected. All of the CCTA images were reconstructed by the means of both STD and SSF motion correction, which was about 85% period of image reconstruction. An experienced radiologist made use of post-processing workstation to measure the value of CT about blood vessel the noise of image. Comparisons of variables about the CT value of the major blood vessels, noise, SNR and CNR were performed with t test.Image quality and interpretability of STD and SSF reconstructions were compared. CCTA images were interpreted with 5-points score system by two experienced radiologists. The image qualities were assessed on per-artery and per-segment level,and interpretability was performed on per-segment, per-artery, and per-patient levels. Comparisons of variables were performed with paired Wilcoxon rank sum test. Results The STD and SSF reconstructions of three main vessels showed no signiifcant differences in CT value. The image qualities were higher with the use of SSF reconstructions than STD reconstructions on LM [(4.7±0.5), (4.9±0.3), Z=-2.232a, P=0.026], LAD [(4.4±0.4), (4.5±0.4), Z=-2.68a, P=0.007], LCX [(4.1±0.6), (4.3±0.4), Z=-2.668a, P=0.008], and RCA [(3.5±0.6), (4.5±0.4), Z=-4.785a, P=0] levels. Conclusion The use of SSF motion correction algorithm improved image quality and interpretability or coronary CTA.关键词
冠状动脉血管/体层摄影术/X线计算机/冠脉追踪技术Key words
coronary vessels/tomography/X-ray computer/snapshot freeze分类
医药卫生引用本文复制引用
高剑波,蒋耀军,刘杰,吴艳,侯平,查开继..冠脉追踪技术结合单能量成像去运动伪影的临床应用[J].中国医疗设备,2016,31(7):12-15,4.
