Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, Alberta, Canada.
J Magn Reson Imaging. 2011 Sep;34(3):532-8. doi: 10.1002/jmri.22657. Epub 2011 Jul 14.
To determine the effect of cardiac-related carotid artery motion on the image quality of 3D contrast-enhanced MR angiography (CEMRA) in patients presenting with suspected carotid artery disease.
Twenty patients with suspected carotid artery disease underwent cardiac-gated cinematic steady-state free precession of the carotid arteries followed by standard 3D CEMRA at 1.5 T. Using postprocessing, computer programs determined the degree of vessel wall dilation and translation across the cardiac cycle from the cinematic exam and related this to vessel wall sharpness in 3D CEMRA, which was determined objectively by computer analysis and subjectively by a panel of expert neuroradiologists.
In patients, across 40 arteries the average carotid vessel movement due to cardiac pulsation was 0.36 ± 0.17 mm and translation 1.53 ± 0.94 mm. When using computer analysis of sharpness, the mean carotid wall motion had a weak negative correlation with 3D CEMRA vessel sharpness (Pearson's correlation -0.23, P < 0.01). However, the same trend was not present from the radiological review.
In standard 3D CEMRA in patients with suspected carotid artery disease, cardiac-related carotid movement was a statistically significant source of degradation in vessel sharpness, but did not appear to be clinically significant.
确定在疑似颈动脉疾病患者中，与心脏相关的颈动脉运动对三维对比增强磁共振血管造影（CEMRA）图像质量的影响。
20 名疑似颈动脉疾病的患者在 1.5T 磁共振成像仪上接受了心脏门控电影稳态自由进动颈动脉检查，随后进行了标准的三维 CEMRA 检查。使用后处理技术，计算机程序从电影检查中确定了血管壁在心动周期中的扩张和移位程度，并将其与三维 CEMRA 中的血管壁锐利度相关联，这通过计算机分析和一组专家神经放射学家的主观评估来客观确定。
在患者的 40 条动脉中，由于心脏搏动导致的平均颈动脉运动为 0.36 ± 0.17mm，平移为 1.53 ± 0.94mm。使用锐利度的计算机分析时，颈动脉壁运动的平均值与三维 CEMRA 血管锐利度呈弱负相关（Pearson 相关系数-0.23，P < 0.01）。然而，从放射学审查中并没有出现相同的趋势。
在疑似颈动脉疾病患者的标准三维 CEMRA 中，与心脏相关的颈动脉运动是导致血管锐利度降低的一个统计学上显著的来源，但似乎没有临床意义。
