{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,24]],"date-time":"2026-10-24T01:42:28Z","timestamp":1792806148970,"version":"4.5.0"},"reference-count":22,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,2,1]]},"abstract":"\n OBJECTIVE<\/jats:title>\n Morphological changes in unruptured intracranial aneurysms (UIAs) are an imaging marker of aneurysm instability. Recent studies have indicated the ability of MR vessel wall imaging (VWI) to stratify unstable UIAs based on a correlation with histopathological aneurysm wall inflammation. In the present study the authors investigated the relationships between aneurysm growth patterns and the segmentation of aneurysm wall enhancement (AWE) in VWI.<\/jats:p>\n <\/jats:sec>\n \n METHODS<\/jats:title>\n \n A total of 120 aneurysms with serial angiography from a follow-up period of at least 2 years (mean 65 months, range 24\u2013215 months) were assessed by VWI. Two readers independently evaluated the patterns of morphological changes (stable, whole sac expansion, and secondary aneurysm formation) and the segmentation of AWE (no, focal, and circumferential AWE). The contrast enhancement ratio of the aneurysm wall versus the pituitary stalk (CR\n stalk<\/jats:sub>\n ) was calculated for the quantitative assessment of AWE. Statistical analyses were performed to investigate the relationships between AWE patterns and patient baseline profiles, aneurysm characteristics, and morphological modifications.\n <\/jats:p>\n <\/jats:sec>\n \n RESULTS<\/jats:title>\n \n Forty-one of 120 UIAs (34%) exhibited aneurysm growth (whole sac expansion in 19 and secondary aneurysm formation in 22). AWE was detected in 35 of 120 UIAs (focal AWE in 25 and circumferential AWE in 10). The maximum diameter of, irregularities in, and morphological modifications in aneurysms were associated with the segmentation of AWE. Focal AWE correlated with secondary aneurysm formation, and circumferential AWE correlated with whole sac expansion. In focal AWE, CR\n stalk<\/jats:sub>\n was significantly higher in secondary aneurysm formation than in stable UIAs. UIAs without AWE (categorized as no AWE) correlated with aneurysm stability.\n <\/jats:p>\n <\/jats:sec>\n \n CONCLUSIONS<\/jats:title>\n The segmentation of AWE was associated with aneurysm growth scenarios and may provide a novel insight into the evaluation of unstable UIAs.<\/jats:p>\n <\/jats:sec>","DOI":"10.3171\/2021.2.jns2114","type":"journal-article","created":{"date-parts":[[2021,8,20]],"date-time":"2021-08-20T13:51:01Z","timestamp":1629467461000},"page":"449-455","source":"Crossref","is-referenced-by-count":18,"title":["Segmentation of aneurysm wall enhancement in evolving unruptured intracranial aneurysms"],"prefix":"10.3171","volume":"136","author":[{"given":"Yukishige","family":"Hashimoto","sequence":"first","affiliation":[{"name":"Department of Neurosurgery and Interventional Neuroradiology, Hiroshima City Asa Citizens Hospital;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toshinori","family":"Matsushige","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery and Interventional Neuroradiology, Hiroshima City Asa Citizens Hospital;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Reo","family":"Kawano","sequence":"additional","affiliation":[{"name":"Clinical Research Center in Hiroshima, Hiroshima University Hospital;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Koji","family":"Shimonaga","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery and Interventional Neuroradiology, Hiroshima City Asa Citizens Hospital;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michitsura","family":"Yoshiyama","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery and Interventional Neuroradiology, Hiroshima City Asa Citizens Hospital;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroki","family":"Takahashi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery and Interventional Neuroradiology, Hiroshima City Asa Citizens Hospital;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mayumi","family":"Kaneko","sequence":"additional","affiliation":[{"name":"Department of Pathology, Hiroshima City Asa Citizens Hospital;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chiaki","family":"Ono","sequence":"additional","affiliation":[{"name":"Department of Radiology, Hiroshima City Asa Citizens Hospital; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shigeyuki","family":"Sakamoto","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"issue":"12","key":"r1","series-title":"Nat Rev Neurol","doi-asserted-by":"publisher","first-page":"699","DOI":"10.1038\/nrneurol.2016.150","article-title":"Unruptured intracranial aneurysms: development, rupture and preventive management","volume":"12","author":"Etminan N","year":"2016","unstructured":"Etminan N, Rinkel GJ. 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