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Impairment of these branches can result in severe consequences, including neurological deficits or cognitive impairment. This study aimed to analyze these branches and their variations in vivo, using data from 3D rotational angiographies (3D-RA).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Material and Methods<\/jats:title>\n                    <jats:p>We reviewed 3D-RAs of 209 hemispheres from 191 patients with pathologies remote from the region of interest. The presence, origin and course of the RAH were investigated. Delineation, origin and number of perforator vessels originating from the A1 segment (MLSAs) were assessed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The RAH was observed in 151 hemispheres (72%), including a\u00a0single RAH in 144 (69%) and a\u00a0doubled RAH in 7 (3%) hemispheres. In 37% of cases, the RAH originated from the A1 segment, in 56% from the A1\/A2 transition, and in 7% from the A2 segment. In the presence of RAH, additional MLSAs originating from the A1 segment were present in 25% of hemispheres. A\u00a0weak negative correlation was identified between the presence of one or two RAH and the frequency of additional MLSAs.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The study revealed significant differences in the presence and anatomical course of RAH and MLSAs compared to previous research. The findings highlight the importance of 3D-RA in visualizing the complex anatomy of the ACA, particularly to avoid complications during surgical or endovascular procedures.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00062-025-01539-y","type":"journal-article","created":{"date-parts":[[2025,7,22]],"date-time":"2025-07-22T13:37:12Z","timestamp":1753191432000},"page":"805-816","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["In-vivo Assessment of the Proximal Branches of the Anterior Cerebral Artery Using Rotational Angiography"],"prefix":"10.1007","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3971-7060","authenticated-orcid":false,"given":"Maximilian","family":"Rauch","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joachim","family":"Berkefeld","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Janine","family":"Mokbel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Deller","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elke","family":"Hattingen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stefan","family":"Weidauer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,7,22]]},"reference":[{"key":"1539_CR1","doi-asserted-by":"crossref","first-page":"927","DOI":"10.3171\/jns.1992.77.6.0927","volume":"77","author":"A van der Zwan","year":"1992","unstructured":"van der Zwan\u00a0A, Hillen\u00a0B, Tulleken\u00a0CA, Dujovny\u00a0M, Dragovic\u00a0L. 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M.\u00a0Rauch, J.\u00a0Berkefeld, J.\u00a0Mokbel, E.\u00a0Hattingen and S.\u00a0Weidauer declare that they have no competing interests.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}}]}}