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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