Group-encoded Ungated Inversion Nulling for Non-contrast Enhancement in the Steady State (GUINNESS): a balanced SSFP-Dixon technique for breath-held non-contrast MRA
نویسندگان
چکیده
Purpose: While contrast-enhanced MR Angiography (CEMRA) is widely used for evaluation of vascular pathology, recent nephrogenic systemic fibrosis (NSF) concerns following administration of Gadolinium based contrast agents have spurred interest in non-contrast MRA methods. Balanced steady state free precession (bSSFP) imaging [1-3] has shown great promise due to its high SNR and short scan times and has been successful in coronary and renal artery imaging. Robust fat suppression remains challenging at high field strengths due to B0 and B1 inhomogeneities. Conventional fat saturation compromises the SSFP steady state, causing ghosting artifacts. We propose GUINNESS (Group-encoded Ungated Inversion Nulling for Non-contrast Enhancement in the Steady State) a balanced SSFP-Dixon 3D technique with a novel group-encoded k-space segmentation scheme for breath-held non-contrast MRA.
منابع مشابه
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