对比增强磁共振血管造影：k空间截断对颈动脉模型管腔显示的影响
Contrast-enhanced MR angiography: the effects of k-space truncation on luminal representation in a carotid artery phantom model.
作者信息
Melhem E R, Serfaty J M, Jones L, Itoh R, Kuszyk B S, Martin J B, Gailloud P, Murphy K P, Rufenacht D A
机构信息
Department of Radiology and Radiological Sciences, The Johns Hopkins Hospital, Baltimore, MD 21287, USA.
出版信息
AJNR Am J Neuroradiol. 2000 Jun-Jul;21(6):1028-31.
Abstract
Using carotid bifurcation phantom models with different degrees of stenoses, we evaluated the accuracy of vessel lumen representation on MR images obtained from the inverse Fourier transform of different k-space percentages. Our results show that the lower thresholds of truncated k-space sampling are dictated by the severity of luminal narrowing. The defined thresholds may help improve efficiency of 3D MR imaging of the carotid arteries while maintaining adequate luminal representation.
摘要
我们使用具有不同狭窄程度的颈动脉分叉体模模型，评估了从不同k空间百分比的逆傅里叶变换获得的磁共振图像上血管腔表示的准确性。我们的结果表明，截断k空间采样的较低阈值由管腔狭窄的严重程度决定。所定义的阈值可能有助于提高颈动脉三维磁共振成像的效率，同时保持足够的管腔表示。
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