Abstract #1319

Ultrashort TE Time-Spatial Labeling Inversion Pulse MRA for Simulated Visceral Arterial Diseases Indicated for Endovascular Interventions.

Ryuichi Mori¹, Hideki Ota², Simon TUPIN³, Tomoyoshi Kimura¹, Hironobu Sasaki¹, Tatsuo Nagasaka¹, Takashi Nishina⁴, Sho Tanaka⁴, Yoshiaki Morita², Yoshimori kassai⁴, and Kei Takase²

¹Department of Radiology, Tohoku University Hospital, Sendai, Japan, ²Diagnostic Radiology, Tohoku University Hospital, Sendai, Japan, ³Institute of Fluid Science, Tohoku University, Sendai, Japan, ⁴Canon Medical Systems corp., Tochigi, Japan

Visceral arterial diseases should be evaluated before and after endovascular interventions. We compared ultrashort TE (UTE) and steady-state free precession (SSFP) time-SLIP MRAs regarding their signal decay in pulsatile flow phantoms reflecting stenosis, aneurysm, and metallic stents. In all phantom models, UTE time-SLIP MRA provided superior visualization of target lumens to SSFP time-SLIP MRA. UTE time-SLIP MRA demonstrated minimal signal decay except for in-stent lumen of a stainless-steel stent. Our results indicated robustness of UTE time-SLIP MRA for intra-voxel spin dephasing caused by accelerated flow at the stenosis, turbulent flow in the aneurysm and susceptibility effects from metallic devices.

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