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Abstract #1910

Imaging Patterns and Implications of Time-of-Flight Magnetic Resonance Angiography in Intracranial Atherosclerotic Stenosis

Jinhao Lyu1, Ning Ma2, Xiaoxiao Ma1, Lin Ma1, and Xin Lou1

1Department of Radiology, Chinese PLA General Hospital, Beijing, China, 2Department of Interventional Radiology, Beijing Tiantan Hospital, Beijing, China

The imaging pattern and implication of intracranial atherosclerotic stenosis on TOF MRA had not been fully understood. In patients with middle cerebral artery stenosis, we had used high-resolution vessel wall imaging to evaluate plaque morphology and conventional angiography to evaluate cerebral hemodynamics in groups with different TOF MRA pattern. We had found that the TOF MRA pattern was associated with stenosis percentage, the middle cerebral artery branch signal intensity distal to the site of stenosis on TOF MRA was associated with hemodynamic impairments and was determined by the status of antegrade flow.

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