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Abstract #4130

FLEXA 3DTOF: Fast 3D TOF MR Angiography using Thin-slab Two-Point Dixon Acquisition

Naoyuki Takei1, Shiori Amemiya2, Tsuyoshi Ueyama3, Keita Fujii3, Osamu Abe2, and Tetsuya Wakayama1
1GE Healthcare, Tokyo, Japan, 2Radiology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan, 3Radiology, The University of Tokyo Hospital, Tokyo, Japan


Conventional 3DTOF MOTSA MRA technique without contrast agent is an established technique for carotid artery examination. The scan time is relatively long to have opportunity to improve. We have explored 3DTOF with two-point Dixon acquisition to achieve faster scan time by optimizing scan parameters and dealing with Water-Fat swap issue where B0 inhomogeneity and strong susceptibility exist at off-center scan in multi-slab acquisitions. The proposed Dixon MRA offers an alternative approach to conventional 3DTOF with about 4.2 times faster acquisition and better image contrast between artery and muscle for carotid MRA.

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