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Abstract #1612

Non-Contrast Enhanced Ultrashort Echo Time MR Angiography (Silent MRA) for Intracranial Aneurysms Treated with Flow-Diverter Stents and Coils

Nao Takano1, Michimasa Suzuki1, Yutaka Ikenouchi1, Munetaka Yamamoto2, Kohsuke Teranishi2, Syo Murata1, Nozomi Hamasaki1, Haruyoshi Hoshito1, Christina Andica1, Toshiaki Akashi1, Akihiko Wada1, Hidenori Oishi3, and Shigeki Aoki1
1Department of Radiology, Juntendo University Hospital, Tokyo, Japan, Tokyo, Japan, 2Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan, Tokyo, Japan, 3Department of Neuroendovascular Therapy, Juntendo University School of Medicine, Tokyo, Japan, Tokyo, Japan

We evaluated the usefulness of non-contrast enhanced ultrashort TE MRA (Silent MRA) for intracranial aneurysms treated with flow-diverter (FD) stents and coils. FD stent has a higher metal coverage, thus it is difficult to visualize in-stent flow using TOF-MRA, due to the magnetic susceptibility. In contrast, silent MRA uses ultrashort TE, therefore may visualize in-stent flow. In silent MRA, in-stent flow score was superior to that of TOF-MRA (p<0.05). Moreover, aneurysm occlusion status was in good agreement with X-ray DSA (κ = 0.84). Therefore, silent MRA is useful for the evaluation of intracranial aneurysms treated with FD stents and coils.

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