Free-Breathing Radial 3D Fat-Suppressed T1-Weighted Gradient Echo Sequence

作者：Hersh Chandarana, Kai Tobias Block, Andrew B. Rosenkrantz, Ruth Lim, Daniel Kim, David J. Mossa, James S. Babb, Berthold Kiefer, Vivian S. Lee · 发表于：Investigative Radiology · 年份：2011 · DOI：10.1097/rli.0b013e31821eea45 · 被引用次数：295 · 研究领域：Hepatocellular Carcinoma Treatment and Prognosis、Organ Transplantation Techniques and Outcomes、Advanced MRI Techniques and Applications

OBJECTIVE: : To compare free-breathing radially sampled 3D fat suppressed T1-weighted gradient-echo acquisitions (radial volumetric interpolated breath-hold examination [VIBE]) with breath-hold (BH) and free-breathing conventional (rectilinearly sampled k-space) VIBE acquisitions for postcontrast imaging of the liver. MATERIALS AND METHODS: : Eighteen consecutive patients referred for clinically indicated liver magnetic resonance imaging were imaged at 3 T. Three minutes after a single dose of gadolinium contrast injection, free-breathing radial VIBE, BH VIBE, and free-breathing VIBE with 4 averages were acquired in random order with matching sequence parameters. Radial VIBE was acquired with the "stack-of-stars" scheme, which uses conventional sampling in the slice direction and radial sampling in-plane.All image data sets were evaluated independently by 3 radiologists blinded to patient and sequence information. Each reader scored the following parameters: overall image quality, respiratory motion artifact, pulsation artifact, liver edge sharpness, and hepatic vessel clarity using a 5-point scale, with the highest score indicating the most optimum examination. Mixed model analysis of variance was used to compare sequences in terms of each measure of image quality. RESULTS: : When scores were averaged over readers, there was no statistically significant difference between radial VIBE and BH VIBE regarding overall image quality (P = 0.1015), respiratory motion artifact (P = 1...