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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