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Mra-Based Evaluation Of Anatomical Variation Of Circle Of Willis In Adult Pakistanis, Rehana Shaikh, Saba Sohail
Mra-Based Evaluation Of Anatomical Variation Of Circle Of Willis In Adult Pakistanis, Rehana Shaikh, Saba Sohail
Department of Radiology
Objective: To determine the frequency and patterns of normal anatomical variation of Circle of Willis on magnetic resonance angiogram in adults without cerebrovascular disease.
Methods: This descriptive cross-sectional study was conducted at the Radiology Department of Dow University of Health Sciences / Civil Hospital, Karachi, from January to December 2016, and comprised patients referred for magnetic resonance imaging of the brain and magnetic resonance angiogram without any clinical or radiological manifestation of cerebrovascular disease, primarily including those with suspected demyelination, infection, epilepsy or metastases. Three-dimensional time-of-flight magnetic resonance angiography was performed. The Circle of Willis was assessed for its completeness …