@article{MPS, author = {Nguyễn Tuấn Sơn and Ngo Hoa and Nguyen Dung and Mac Tuan and Nguyen Son and Pham Manh}, title = { Anatomy of the Anterior Half of the Willis Circle through 256-channel Computed Tomography Images Nguyen Tuan Son1, Ngo Xuan Khoa2, Nguyen Quoc Dung3, Mac Dang}, journal = {VNU Journal of Science: Medical and Pharmaceutical Sciences}, volume = {34}, number = {2}, year = {2018}, keywords = {}, abstract = {Abstract: The paper studies the anatomy index of the anterior half of the Willis circle and anatomical variants using 256-channel computed tomography images. The method of convenient sample size 101 was used in the current retrospective cross-sectional study. The study results show that the display of A1 arterior cerebral artery was 97.5%; the display of anterior communicating artery was 81.2%; the display of M1 segment of the middle cerebral artery was 99.5%; the length and width of the A1L (left) sections were 2.46 ± 0.46 and 16.90 ± 2.90; A1R (right): 2.20 ± 0.51 and 16.86 ± 2.90; and the length and width of the anterior communicating artery were 1.61 ± 0.68 and 2.93 ± 1.38. The study also identified four groups of seven species with 40 variants in diameter; a group of two types with six variants of the pre-polygon shape Willis. The study concludes that the 256-channel computed tomography images of the anterior half of the Willis circle fully displayed the index of common anatomy and anatomical variants. Keywords:  Abstract: The paper studies the anatomy index of the anterior half of the Willis circle and anatomical variants using 256-channel computed tomography images. The method of convenient sample size 101 was used in the current retrospective cross-sectional study. The study results show that the display of A1 arterior cerebral artery was 97.5%; the display of anterior communicating artery was 81.2%; the display of M1 segment of the middle cerebral artery was 99.5%; the length and width of the A1L (left) sections were 2.46 ± 0.46 and 16.90 ± 2.90; A1R (right): 2.20 ± 0.51 and 16.86 ± 2.90; and the length and width of the anterior communicating artery were 1.61 ± 0.68 and 2.93 ± 1.38. The study also identified four groups of seven species with 40 variants in diameter; a group of two types with six variants of the pre-polygon shape Willis. The study concludes that the 256-channel computed tomography images of the anterior half of the Willis circle fully displayed the index of common anatomy and anatomical variants. Keywords: The Willis circle, cerebral artery, cerebral angiography. References: [1] Hoàng Minh Tú (2011), “Nghiên cứu biến đổi giải phẫu mạch máu não trên hình ảnh MSCT 64”, Luận văn Thạc sỹ y học, Đại học Y Hà Nội, tr. 6-107.[2] Smita B. Shinde, G. A. Shroff (2016), “Anatomical variations in anterior cerebral artery in human cadaver”, International Journal of Anatomy and Research, 2016, Vol 4(2), pp.2269-72;[3] Michelle Stephanie Jiménez-Sosa (2017), “Anatomical Variants of Anterior Cerebral Arterial Circle. A Study by Multidetector Computerized 3D Tomographic Angiography”, Int. J. Morphol, 35(3), pp. 1121-1128.[4] Cihad Hamidi, Yas ar Bu kte, Salih Hattapog lu(2013), “Display with 64-detector MDCT angiography of cerebral vascular variations”, Surg Radiol Anat, 35, pp.729–736;[5] Masatou Kawashima (2005), “Microsurgical anatomy of cerebral revascularization. Part I: Anterior circulation”, J Neurosurg, 102, pp.116–131.[6] SB Pai, RN Kulkarni, RGVarma(2005), “Microsurgical anatomy of the anterior cerebral artery – anterior communicating artery complex: An Indian study”, Neurology Asia,10, pp.21 – 28.[7] Hartkamp, M.J., et al(1999). \"Circle of Willis collateral flow investigated by magnetic resonance angiography.\" Stroke30(12), pp: 2671-8.[8] Li, Q., et al (2011). \"A multidetector CT angiography study of variations in the circle of Willis in a Chinese population.\" J Clin Neurosci18(3), pp: 379-83.  }, issn = {2588-1132}, doi = {10.25073/2588-1132/vnumps.4130}, url = {https://js.vnu.edu.vn/MPS/article/view/4130} }