{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T21:57:13Z","timestamp":1790978233464,"version":"4.1.0"},"reference-count":20,"publisher":"BMJ","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J NeuroIntervent Surg"],"accepted":{"date-parts":[[2012,3,15]]},"published-print":{"date-parts":[[2013,7]]},"abstract":"<jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>A study was undertaken to determine the typical length, diameter and taper of vessels in the anterior cerebral circulation.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>The sample size was calculated at 100 patients based on similar measurements in the literature and divided into cohorts based on gender and side. These patients were consecutively collected from a population that had undergone CT angiography and did not have any vascular abnormality. The arterial diameter was measured at the proximal cavernous internal carotid artery (ICA), the ICA terminus, the middle cerebral artery (MCA) origin and an M2 origin. The length between these endpoints was calculated along the center line. The vessel taper was calculated for the ICA as the change in caliber per unit length.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>The mean length of the ICA from the proximal cavernous segment to the ICA terminus was 33.1\u00b16.1\u2005mm. The mean diameter at the cavernous ICA and the ICA terminus was 5\u00b10.6\u2005mm and 3.6\u00b10.4\u2005mm, respectively. The mean ICA taper was 0.04\u00b10.02\u2005mm\/1\u2005mm. For the MCA, the diameter at the MCA and M2 origins measured 3.1\u00b10.4\u2005mm and 2.4\u00b10.4\u2005mm, respectively. The mean MCA length was 22.5\u00b18.1\u2005mm. There was no significant difference based on gender or between right and left sides. Patients aged &gt;60\u2005years had longer ICAs (p=0.02), larger cavernous ICA (p=0.003), ICA terminus (p&lt;0.0001) and MCA origin (p=0.01) diameters than those aged 40\u201360\u2005years. The ICA vessel taper did not change with age.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>ICA and MCA vessel size did not change based on gender or side. Older patients had more redundant vessels based on diameter and length. The ICA has a gentle taper from its proximal cavernous segment to the ICA terminus. This information can be important in planning interventions or designing endovascular devices.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/neurintsurg-2012-010314","type":"journal-article","created":{"date-parts":[[2012,4,5]],"date-time":"2012-04-05T00:10:44Z","timestamp":1333584644000},"page":"371-375","source":"Crossref","is-referenced-by-count":110,"title":["Cerebrovascular geometry in the anterior circulation: an analysis of diameter, length and the vessel taper"],"prefix":"10.1136","volume":"5","author":[{"given":"Ansaar T","family":"Rai","sequence":"first","affiliation":[{"name":"Department of Interventional Neuroradiology, West Virginia University Hospital, Morgantown, West Virginia, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeffery P","family":"Hogg","sequence":"additional","affiliation":[{"name":"Department of Interventional Neuroradiology, West Virginia University Hospital, Morgantown, West Virginia, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brendan","family":"Cline","sequence":"additional","affiliation":[{"name":"Department of Interventional Neuroradiology, West Virginia University Hospital, Morgantown, West Virginia, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gerald","family":"Hobbs","sequence":"additional","affiliation":[{"name":"Department of Community Medicine and Biostatistics, West Virginia University Hospital, Morgantown, West Virginia, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2012,4,4]]},"reference":[{"key":"2025092912470068000_5.4.371.1","doi-asserted-by":"crossref","first-page":"615","DOI":"10.1177\/02841851660050P166","article-title":"Anterior cerebral-internal carotid artery and middle cerebral-internal carotid artery ratios","volume":"5","author":"Wollschlaeger","year":"1966","journal-title":"Acta Radiol Diagn (Stockh)"},{"key":"2025092912470068000_5.4.371.2","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1177\/153857446700100301","article-title":"Intraluminal diameters of the intracranial arteries","volume":"1","author":"Ring","year":"1967","journal-title":"Vasc Surg"},{"key":"2025092912470068000_5.4.371.3","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1177\/028418517001000101","article-title":"Normal size of the internal carotid, middle cerebral and anterior cerebral arteries","volume":"10","author":"Gabrielsen","year":"1970","journal-title":"Acta Radiol Diagn (Stockh)"},{"key":"2025092912470068000_5.4.371.4","doi-asserted-by":"publisher","DOI":"10.1007\/BF00588220"},{"key":"2025092912470068000_5.4.371.5","doi-asserted-by":"publisher","DOI":"10.3174\/ajnr.A1976"},{"key":"2025092912470068000_5.4.371.6","doi-asserted-by":"publisher","DOI":"10.1161\/STROKEAHA.110.596254"},{"key":"2025092912470068000_5.4.371.7","doi-asserted-by":"publisher","DOI":"10.1111\/j.1754-9485.2010.02211.x"},{"key":"2025092912470068000_5.4.371.8","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejrad.2010.01.004"},{"key":"2025092912470068000_5.4.371.9","doi-asserted-by":"publisher","DOI":"10.3174\/ajnr.A0741"},{"key":"2025092912470068000_5.4.371.10","first-page":"9","article-title":"The measurement of the calibers and blood-flow velocities of the arteries of the circle of Willis: a statistical investigation of 120 living subjects using transcranial color-Doppler ultrasonography","volume":"99","author":"Macchi","year":"1994","journal-title":"Ital J Anat Embryol"},{"key":"2025092912470068000_5.4.371.11","doi-asserted-by":"publisher","DOI":"10.1159\/000145167"},{"key":"2025092912470068000_5.4.371.12","doi-asserted-by":"publisher","DOI":"10.1161\/01.HYP.33.6.1392"},{"key":"2025092912470068000_5.4.371.13","doi-asserted-by":"publisher","DOI":"10.1038\/sj.jhh.1000669"},{"key":"2025092912470068000_5.4.371.14","doi-asserted-by":"crossref","first-page":"385","DOI":"10.1142\/S1758825111001044","article-title":"Effects of geometric variations on the buckling of arteries","volume":"3","author":"Datir","year":"2010","journal-title":"Int J Appl Mech"},{"key":"2025092912470068000_5.4.371.15","doi-asserted-by":"crossref","first-page":"1032","DOI":"10.1007\/s10439-010-0212-2","article-title":"Determination of the critical buckling pressure of blood vessels using the energy approach","volume":"39","author":"Han","year":"2011","journal-title":"Ann Biomed Eng"},{"key":"2025092912470068000_5.4.371.16","doi-asserted-by":"publisher","DOI":"10.1007\/s10439-008-9582-0"},{"key":"2025092912470068000_5.4.371.17","doi-asserted-by":"publisher","DOI":"10.1016\/j.avsg.2008.11.007"},{"key":"2025092912470068000_5.4.371.18","doi-asserted-by":"publisher","DOI":"10.3171\/2011.4.JNS102050"},{"key":"2025092912470068000_5.4.371.19","doi-asserted-by":"crossref","unstructured":"Heller RS Safain M Malek AM . Double-barrel entanglement of intracranial Enterprise stents resulting from undetected incomplete stent apposition. J Neurointerv Surg. 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