A comprehensive study of magnetic resonance angiography of circle of Willis in population of Western Uttar Pradesh
Keywords:
Circle of Willis, MRA, Anatomic variations, TOFAbstract
Background: Circulus Arteriosus cerebrii, another name for Circle of Willis, establishes a polygonal anastomotic channel between two internal carotid arteries and two vertebral arteries. The arterial circle is located in the interpeduncular fossa, near the base of the brain. It has been established through anatomical and radiological studies that there are anatomical variations in healthy persons. Aim: To evaluate the anatomical variations in arteries of circle of Willis supplying brain through Magnetic Resonance Angiography (MRA) in population of western UP. Methods and Materials: This cross-sectional study included 264 patients who met inclusion criteria. Non-contrast Magnetic Resonance Angiography of Circle of Willis was carried out among the individuals after a written informed consent. Angiography of brain (circle of Willis) scanning protocol consisted of 3-dimensional time of flight Trans axial acquisition. MRA of brain was performed on GE 1.5 TESLA Optima MRI machine. MRA Brain angiography images were viewed for normal pattern of arterial anatomy and their variations. Results: The complete variant in male was 58.9% (n=103) while in females it was 59.6% (n=53). The incomplete variant in male & females was 41.1% (n=72) and 40.4% (n=36) respectively.
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