{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,24]],"date-time":"2026-08-24T01:03:45Z","timestamp":1787533425631,"version":"build-2736575974"},"reference-count":23,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"5","license":[{"start":{"date-parts":[[2021,8,30]],"date-time":"2021-08-30T00:00:00Z","timestamp":1630281600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Neurosurg.","NEUROS"],"published-print":{"date-parts":[[2021,11]]},"abstract":"Abstract<\/jats:title>\n \n BACKGROUND<\/jats:title>\n The hemodynamic changes after superficial temporal artery (STA) to middle cerebral artery (MCA) bypass surgery are unclear.<\/jats:p>\n <\/jats:sec>\n \n OBJECTIVE<\/jats:title>\n To clarify the hemodynamics by comparing flow parameters obtained by 4-dimensional (4D) flow magnetic resonance imaging (MRI) and intraoperative MCA pressure measurement.<\/jats:p>\n <\/jats:sec>\n \n METHODS<\/jats:title>\n \n We recruited 23 patients who underwent STA-MCA bypass surgery for internal carotid artery (ICA) or MCA stenosis. We monitored intraoperative MCA, STA, and radial artery (RA) pressure. All patients underwent 4D flow MRI preoperatively and 3 wk after surgery to quantify the blood flow volume (BFV) of the ipsilateral ICA (BFV\n iICA<\/jats:sub>\n ), contralateral ICA (BFV\n cICA<\/jats:sub>\n ), basilar artery (BFV\n BA<\/jats:sub>\n ), ipsilateral STA (BFV\n iSTA<\/jats:sub>\n ), and contralateral STA (BFV\n cSTA<\/jats:sub>\n ). The sum of intracranial BFV was defined as BFV\n total<\/jats:sub>\n . We compared BFV parameters and intraoperative pressure.\n <\/jats:p>\n <\/jats:sec>\n \n RESULTS<\/jats:title>\n \n BFV\n iSTA<\/jats:sub>\n significantly increased after surgery (\n P<\/jats:italic>\n \u00a0<\u00a0.001). BFV\n iICA<\/jats:sub>\n and BFV\n BA<\/jats:sub>\n significantly decreased after surgery (BFV\n iICA<\/jats:sub>\n P<\/jats:italic>\n \u00a0=\u00a0.005; BFV\n BA<\/jats:sub>\n P<\/jats:italic>\n \u00a0=\u00a0.02). No significant difference was observed between BFV\n cICA<\/jats:sub>\n before and after surgery. As a result, BFV\n total<\/jats:sub>\n postoperatively increased by 6.8%; however, no significant difference was observed. Flow direction at M1 changed from antegrade to unclear after surgery in 5 patients. Intraoperative MCA pressure and MCA\/RA pressure ratio significantly increased after surgery (\n P<\/jats:italic>\n \u00a0<\u00a0.001). We found a stronger positive correlation between MCA pressure increase ratio and BFV\n total<\/jats:sub>\n increase ratio in patients with lower pre-MCA pressure (r\u00a0=\u00a00.907,\n P<\/jats:italic>\n \u00a0<\u00a0.001).\n <\/jats:p>\n <\/jats:sec>\n \n CONCLUSION<\/jats:title>\n The visual and quantitative assessment of 4D flow MRI revealed that intracranial blood flow changes complementarily after STA-MCA bypass surgery. 4D flow MRI may detect the improvement of cerebral perfusion pressure.<\/jats:p>\n <\/jats:sec>","DOI":"10.1093\/neuros\/nyab305","type":"journal-article","created":{"date-parts":[[2021,7,21]],"date-time":"2021-07-21T07:32:20Z","timestamp":1626852740000},"page":"909-916","source":"Crossref","is-referenced-by-count":6,"title":["Cross-Comparison of 4-Dimensional Flow Magnetic Resonance Imaging and Intraoperative Middle Cerebral Artery Pressure Measurements Before and After Superficial Temporal Artery-Middle Cerebral Artery Bypass Surgery"],"prefix":"10.1227","volume":"89","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1547-6696","authenticated-orcid":false,"given":"Tetsuro","family":"Sekine","sequence":"first","affiliation":[{"name":"Department of Radiology, Nippon Medical School, Tokyo, Japan"},{"name":"Department of Radiology, Nippon Medical School Musashi Kosugi Hospital, Kanagawa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9753-1873","authenticated-orcid":false,"given":"Yasuo","family":"Murai","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Nippon Medical School, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erika","family":"Orita","sequence":"additional","affiliation":[{"name":"Department of Radiology, Nippon Medical School, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takahiro","family":"Ando","sequence":"additional","affiliation":[{"name":"Department of Radiology, Nippon Medical School, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryo","family":"Takagi","sequence":"additional","affiliation":[{"name":"Department of Radiology, Nippon Medical School, Tokyo, Japan"},{"name":"Department of Radiology, Nihon University School of Medicine, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yasuo","family":"Amano","sequence":"additional","affiliation":[{"name":"Department of Radiology, Nippon Medical School, Tokyo, Japan"},{"name":"Department of Radiology, Nihon University School of Medicine, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fumihiro","family":"Matano","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Nippon Medical School, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0406-0388","authenticated-orcid":false,"given":"Kotomi","family":"Iwata","sequence":"additional","affiliation":[{"name":"Department of Radiology, Nippon Medical School, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masashi","family":"Ogawa","sequence":"additional","affiliation":[{"name":"Department of Radiology, Nippon Medical School, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Makoto","family":"Obara","sequence":"additional","affiliation":[{"name":"Philips Electronics Japan, Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8107-4703","authenticated-orcid":false,"given":"Shinichiro","family":"Kumita","sequence":"additional","affiliation":[{"name":"Department of Radiology, Nippon Medical School, Tokyo, 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