Chang Shixin, Cham Matthew D, Hu Shuguang, Wang Yi
Department of Radiology, Dongfang Hospital, Tongji University, Shanghai, China.
AJR Am J Roentgenol. 2008 Jul;191(1):38-42. doi: 10.2214/AJR.07.2503.
The purpose of this study was to compare whole-heart acquisition with targeted-volume acquisition in 3-T navigator coronary MR angiography with parallel imaging.
The right and left coronary arteries of 20 subjects were imaged with axial whole-heart acquisition and two oblique targeted-volume acquisitions.
Both whole-heart and targeted-volume acquisitions were completed with similar navigator efficiencies ( approximately 50%) and depicted similar coronary artery diameters ( approximately 3 mm) (p >or= 0.06). The lengths of the coronary arteries were not significantly different (p = 0.07-0.45) for the whole-heart and targeted-volume approaches. Depiction of the sharper coronary arteries (p <or= 0.04) and overall image quality (p < 0.02) were better with the targeted-volume approach.
For current 3-T navigator parallel-imaging coronary MR angiography, targeted-volume acquisition yields sharper coronary images than does whole-heart acquisition.
本研究旨在比较3-T导航冠状动脉磁共振血管造影并行成像中全心脏采集与目标容积采集的效果。
对20名受试者的左右冠状动脉进行轴向全心脏采集及两次斜向目标容积采集成像。
全心脏采集与目标容积采集均以相似的导航效率(约50%)完成,且显示出相似的冠状动脉直径(约3毫米)(p≥0.06)。全心脏采集与目标容积采集方法下冠状动脉的长度无显著差异(p = 0.07 - 0.45)。目标容积采集方法在显示更清晰的冠状动脉(p≤0.04)及整体图像质量(p < 0.02)方面表现更佳。
对于当前的3-T导航并行成像冠状动脉磁共振血管造影,目标容积采集比全心脏采集能产生更清晰的冠状动脉图像。