Type of Article: Original Research
Year: 2016 | Volume 4 | Issue 3 | Page No. 2542-2546
Date of Publication: 31-07-2016
A STUDY OF CIRCLE OF WILLIS BY MR ANGIOGRAPHY
Vishal Madhukar Tekale *1, Medha Vijay Ambiye 2.
*1 Assistant Professor, Department of Anatomy, Dr.Shankarrao Chavan Government Medical College, Nanded, Maharashtra, India.
2 Professor and Head, Department of Anatomy, Topiwala National Medical College, Mumbai, Maharashtra, India.
Address: Dr. Vishal Madhukar Tekale, Flat No. 32, Prathamesh Apartment-3, Yash Nagri, Kabra Nagar, Pawdewadi, Nanded, Maharashtra-431605, India.
Introduction: The arterial Circle of Willis at the base of the brain serves as a potential collateral pathway, which will maintain adequate cerebral perfusion in the case of diminished afferent blood supply through internal carotid and basilar arteries.
Aim: 1.The present study aims to assess the normal mean diameter of the vessels forming Circle of Willis. 2. To compare the normal mean diameter of the vessels forming Circle of Willis in age and gender.
Material and Methods: Circle of Willis of 100 healthy persons were examined with the help of 3D-TOF MR Angiography of brain.74 individuals were aged 18-60 years and 26 individuals were aged above 60 years of either sex. All component vessels of the circle were assessed by measuring the diameter. Sections of the vessels that were visualized as continuous segment for at least 0.8mm in diameter were considered to be normal, those smaller than 0.8mm in diameter were considered hypoplastic.
Result: The normal mean diameter of the anterior and posterior cerebral arteries was more or less equal i.e.1.32mm. Internal carotid artery was found to be large i.e.2.70mm and communicating artery was 0.97mm. The diameters of the blood vessels forming circle of Willis were larger in males than in females.
The diameters of the centripetal arteries i.e. Internal carotid artery are larger in older age group while those of centrifugal arteries is smaller.
Conclusion: The present study is an observational study; the data of this study can be helpful to the neurosurgeon in the selection of patient as well as assessing the feasibility of shunt operation.
Key words: Circle of Willis, 3D TOF MR Angiography, Centripetal Arteries, Centrifugal Arteries, Shunt Operation.
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Vishal Madhukar Tekale, Medha Vijay Ambiye. A STUDY OF CIRCLE OF WILLIS BY MR ANGIOGRAPHY. Int J Anat Res 2016;4(3):2542-2546. DOI: 10.16965/ijar.2016.269