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Abstract #5048

Prediction of aneurysm thrombosis after flow diverter stent treatment using four-dimensional flow MRI technique

Minoru Morikawa1, Hirofumi Koike2, Hideki Ishimaru2, Ryo Toya2, Yoichi Morofuji3, and Takayuki Matsuo3
1Department of Radiology, Nagasaki University Hospiral, Nagasaki, Japan, 2Department of Radiological Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan, 3Department of Neurosurgery, Nagasaki University Hospiral, Nagasaki, Japan

Synopsis

Keywords: Blood Vessels, Velocity & Flow

Motivation: Flow-diverter stents (FDS) have treated wide-neck intracranial aneurysms. The pre-treatment situation of intra-aneurysmal flow is essential to predict the thrombosis progress after FDS.

Goal(s): This study aimed to clarify this relationship by quantitatively measuring the intra-aneurysmal flow, especially the energy loss (EL), using 4D flow MRI.

Approach: We evaluated 10 patients of internal carotid artery aneurysms with a 4D flow MRI, and measured these intra-aneurysmal maximum velocity and EL.

Results: 6 of the 10 patients with higher EL observed complete occlusion within 15 months. Remaining 4 patients showed partial thrombosis within one year, and 3 of the 4 patients showed lower EL.

Impact: 4D flow MRI predicts future aneurysm thrombosis after FDS implantation.

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