Radial volumetric imaging breath-hold examination (VIBE) with k-space weighted image contrast (KWIC) for dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced MRI of the liver: advantages over Cartesian VIBE in the arterial phase
Radial volumetric imaging breath-hold examination (VIBE) with k-space weighted image contrast (KWIC) for dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced MRI of the liver: advantages over Cartesian VIBE in the arterial phase
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DOI：
10.1007/s00330-014-3122-0
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发表时间：
2014-06-01
影响因子：
5.9
通讯作者：
Kadoya, Masumi
中科院分区：
文献类型：
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作者：
Fujinaga, Yasunari;Ohya, Ayumi;Kadoya, Masumi
比较k空间加权图像对比度重建（r-VIBE-KWIC）与Cartesian VIBE （c-VIBE）在肝脏动脉期动态钆酸（Gd-EOB-DTPA）增强磁共振成像（DCE-MRI）中的应用。我们回顾了在3-T设备上使用c-VIBE进行的53例连续DCE-MRI研究，以及使用r-VIBE-KWIC进行的53例连续病例，其中包括全帧图像子集（r-VIBEfull）和子帧图像子集（r-VIBEsub；时间分辨率，2.5-3秒）。所有动脉期图像由两名读取器评分：(1)腹主动脉对比增强比（CER）；(2)扫描定时；(3)文物;(4)肝总动脉、右动脉和左动脉显像。c-VIBE、r-VIBEfull和r-VIBEsub的平均腹主动脉CERs分别为3.2、4.3和6.5。各组间差异有统计学意义（P < 0.0001）。除肝总动脉显像外，c-VIBE组的平均评分均显著低于r-VIBEfull组和r-VIBEsub组（P < 0.05）。除扫描时间外，r-VIBEsub组与r-VIBEfull组各因素的平均得分均无显著差异。径向VIBE-KWIC提供比c-VIBE更高的图像质量，而r-VIBEsub具有高时间分辨率，在动脉期DCE-MRI中没有图像退化。欧分径向VIBE-KWIC最大限度地减少了人工影响，并产生了高质量和高时间分辨率的图像。在r-VIBE-KWIC的子帧图像上观察到最大的腹主动脉增强。使用r-VIBE-KWIC，可获得90%以上的最佳动脉期图像。使用r-VIBE-KWIC，肝动脉的显像得到改善。一项双阅读器研究揭示了r-VIBE-KWIC比笛卡尔VIBE的优势。
To compare radial volumetric imaging breath-hold examination with k-space weighted image contrast reconstruction (r-VIBE-KWIC) to Cartesian VIBE (c-VIBE) in arterial phase dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (DCE-MRI) of the liver.We reviewed 53 consecutive DCE-MRI studies performed on a 3-T unit using c-VIBE and 53 consecutive cases performed using r-VIBE-KWIC with full-frame image subset (r-VIBEfull) and sub-frame image subsets (r-VIBEsub; temporal resolution, 2.5-3 s). All arterial phase images were scored by two readers on: (1) contrast-enhancement ratio (CER) in the abdominal aorta; (2) scan timing; (3) artefacts; (4) visualisation of the common, right, and left hepatic arteries.Mean abdominal aortic CERs for c-VIBE, r-VIBEfull, and r-VIBEsub were 3.2, 4.3 and 6.5, respectively. There were significant differences between each group (P < 0.0001). The mean score for c-VIBE was significantly lower than that for r-VIBEfull and r-VIBEsub in all factors except for visualisation of the common hepatic artery (P < 0.05). The mean score of all factors except for scan timing for r-VIBEsub was not significantly different from that for r-VIBEfull.Radial VIBE-KWIC provides higher image quality than c-VIBE, and r-VIBEsub features high temporal resolution without image degradation in arterial phase DCE-MRI.aEuro cent Radial VIBE-KWIC minimised artefact and produced high-quality and high-temporal-resolution images.aEuro cent Maximum abdominal aortic enhancement was observed on sub-frame images of r-VIBE-KWIC.aEuro cent Using r-VIBE-KWIC, optimal arterial phase images were obtained in over 90 %.aEuro cent Using r-VIBE-KWIC, visualisation of the hepatic arteries was improved.aEuro cent A two-reader study revealed r-VIBE-KWIC's advantages over Cartesian VIBE.