{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T04:42:09Z","timestamp":1770352929476,"version":"3.49.0"},"reference-count":28,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"16","license":[{"start":{"date-parts":[[2024,4,15]],"date-time":"2024-04-15T00:00:00Z","timestamp":1713139200000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024,4,15]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND<\/jats:title>\n                    <jats:p>Silent magnetic resonance angiography (MRA) mitigates metal artifacts, facilitating clear visualization of neck remnants after stent and coil embolization of cerebral aneurysms. This study aims to scrutinize hemodynamics at the neck remnant by employing silent MRA and computational fluid dynamics.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>OBSERVATIONS<\/jats:title>\n                    <jats:p>The authors longitudinally tracked images of a partially thrombosed anterior communicating artery aneurysm\u2019s neck remnant, which had been treated with stent-assisted coil embolization, using silent MRA over a decade. Computational fluid dynamics delineated the neck remnant\u2019s reduction process, evaluating hemodynamic parameters such as flow rate, wall shear stress magnitude and vector, and streamlines. The neck remnant exhibited diminishing surface area, volume, neck size, dome depth, and aspect ratio. Its reduction correlated with a decline in the flow rate ratio of the remnant dome to the inflow parent artery. Analysis delineated regions within the contracting neck remnant characterized by consistently low average wall shear stress magnitude and variation, accompanied by notable variations in wall shear stress vector directionality.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>LESSONS<\/jats:title>\n                    <jats:p>Evaluation of neck remnants after stent-coil embolization is possible through silent MRA and computational fluid dynamics. Predicting the neck remnant reduction may be achievable through hemodynamic parameter analysis.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/case24141","type":"journal-article","created":{"date-parts":[[2024,4,15]],"date-time":"2024-04-15T02:43:01Z","timestamp":1713148981000},"source":"Crossref","is-referenced-by-count":1,"title":["Evaluation of the shrinkage process of a neck remnant after stent-coil treatment of a cerebral aneurysm using silent magnetic resonance angiography and computational fluid dynamics analysis: illustrative case"],"prefix":"10.3171","volume":"7","author":[{"given":"Toru","family":"Satoh","sequence":"first","affiliation":[{"name":"Departments of Neurological Surgery, Ryofukai Satoh Neurosurgical Hospital, Hiroshima, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kenji","family":"Sugiu","sequence":"additional","affiliation":[{"name":"Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masafumi","family":"Hiramatsu","sequence":"additional","affiliation":[{"name":"Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun","family":"Haruma","sequence":"additional","affiliation":[{"name":"Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Isao","family":"Date","sequence":"additional","affiliation":[{"name":"Okayama Rosai Hospital, Okayama, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"issue":"11","key":"b1","series-title":"AJNR Am J Neuroradiol","first-page":"2162","article-title":"Follow-up of coiled intracranial aneurysms: comparison of 3D time-of-flight MR angiography at 3T and 1.5T in a large prospective series","volume":"33","author":"Pierot L","year":"2012","unstructured":"Pierot L, Portefaix C, Gauvrit JY, Boulin A. Follow-up of coiled intracranial aneurysms: comparison of 3D time-of-flight MR angiography at 3T and 1.5T in a large prospective series. AJNR Am J Neuroradiol. 2012;33(11):2162\u20132166."},{"issue":"5","key":"b2","series-title":"AJNR Am J Neuroradiol","first-page":"802","article-title":"Visualization of aneurysmal neck and dome after coiling with 3D multifusion imaging of silent MRA and FSE-MR cisternography","volume":"40","author":"Satoh T","year":"2019","unstructured":"Satoh T, Hishikawa T, Hiramatsu M, Sugiu K, Date I. Visualization of aneurysmal neck and dome after coiling with 3D multifusion imaging of silent MRA and FSE-MR cisternography. AJNR Am J Neuroradiol. 2019;40(5):802\u2013807."},{"issue":"3","key":"b3","series-title":"Stroke","first-page":"1043","article-title":"Patterns of neointima formation after coil or stent treatment in a rat saccular sidewall aneurysm model","volume":"52","author":"Gr\u00fcter BE","year":"2021","unstructured":"Gr\u00fcter BE, Wanderer S, Strange F,  Patterns of neointima formation after coil or stent treatment in a rat saccular sidewall aneurysm model. Stroke. 2021;52(3):1043\u20131052."},{"issue":"1","key":"b4","series-title":"Sci Rep","first-page":"6075","article-title":"Association of bleb formation with peri-aneurysmal contact in unruptured intracranial aneurysms","volume":"12","author":"Satoh T","year":"2022","unstructured":"Satoh T, Yagi T, Sawada Y, Sugiu K, Sato Y, Date I. Association of bleb formation with peri-aneurysmal contact in unruptured intracranial aneurysms. Sci Rep. 2022;12(1):6075."},{"issue":"8","key":"b5","series-title":"J Neurointerv Surg","first-page":"791","article-title":"A new combined parameter predicts re-treatment for coil-embolized aneurysms: a computational fluid dynamics multivariable analysis study","volume":"10","author":"Fujimura S","year":"2018","unstructured":"Fujimura S, Takao H, Suzuki T,  A new combined parameter predicts re-treatment for coil-embolized aneurysms: a computational fluid dynamics multivariable analysis study. J Neurointerv Surg. 2018;10(8):791\u2013796."},{"issue":"2","key":"b6","series-title":"AJNR Am J Neuroradiol","first-page":"304","article-title":"Hemodynamics and bleb formation in intracranial aneurysms","volume":"31","author":"Cebral JR","year":"2010","unstructured":"Cebral JR, Sheridan M, Putman CM. Hemodynamics and bleb formation in intracranial aneurysms. AJNR Am J Neuroradiol. 2010;31(2):304\u2013310."},{"issue":"5","key":"b7","series-title":"Neurosurgery","first-page":"1268","article-title":"Role of shear stress in the blister formation of cerebral aneurysms","volume":"67","author":"Shojima M","year":"2010","unstructured":"Shojima M, Nemoto S, Morita A, Oshima M, Watanabe E, Saito N. Role of shear stress in the blister formation of cerebral aneurysms. Neurosurgery. 2010;67(5):1268\u20131275."},{"issue":"1","key":"b8","series-title":"Neurosurg Focus","first-page":"E21","article-title":"Flow-induced, inflammation-mediated arterial wall remodeling in the formation and progression of intracranial aneurysms","volume":"47","author":"Fr\u00f6sen J","year":"2019","unstructured":"Fr\u00f6sen J, Cebral J, Robertson AM, Aoki T. Flow-induced, inflammation-mediated arterial wall remodeling in the formation and progression of intracranial aneurysms. Neurosurg Focus. 2019;47(1):E21."},{"issue":"19","key":"b9","series-title":"J Neurosurg Case Lessons","first-page":"CASE2381","article-title":"Trigeminal neuralgia caused by a persistent primitive trigeminal artery: preoperative three-dimensional multifusion imaging and computational fluid dynamics analysis. Illustrative case","volume":"5","author":"Satoh T","year":"2023","unstructured":"Satoh T, Yasuhara T, Umakoshi M,  Trigeminal neuralgia caused by a persistent primitive trigeminal artery: preoperative three-dimensional multifusion imaging and computational fluid dynamics analysis. Illustrative case. J Neurosurg Case Lessons. 2023;5(19):CASE2381."},{"issue":"2","key":"b10","series-title":"Med Res Arch","article-title":"Peri-aneurysmal contact as a risk factor for aneurysmal rupture in unruptured intracranial aneurysms: an overview","volume":"12","author":"Satoh T","year":"2024","unstructured":"Satoh T, Sato Y, Sawada Y. Peri-aneurysmal contact as a risk factor for aneurysmal rupture in unruptured intracranial aneurysms: an overview. Med Res Arch. 2024;12(2)."},{"issue":"3","key":"b11","series-title":"Stroke","first-page":"745","article-title":"High shear stress and flow velocity in partially occluded aneurysms prone to recanalization","volume":"42","author":"Luo B","year":"2011","unstructured":"Luo B, Yang X, Wang S,  High shear stress and flow velocity in partially occluded aneurysms prone to recanalization. Stroke. 2011;42(3):745\u2013753."},{"issue":"10","key":"b12","series-title":"Stroke","first-page":"2541","article-title":"Blood flow into basilar tip aneurysms. A predictor for recanalization after coil embolization","volume":"47","author":"Sugiyama S","year":"2016","unstructured":"Sugiyama S, Niizuma K, Sato K,  Blood flow into basilar tip aneurysms. A predictor for recanalization after coil embolization. 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Stroke. 2021;52(3):1043\u20131052."},{"issue":"1","key":"b4","series-title":"Sci Rep","first-page":"6075","article-title":"Association of bleb formation with peri-aneurysmal contact in unruptured intracranial aneurysms","volume":"12","author":"Satoh T","year":"2022","unstructured":"Satoh T, Yagi T, Sawada Y, Sugiu K, Sato Y, Date I. Association of bleb formation with peri-aneurysmal contact in unruptured intracranial aneurysms. Sci Rep. 2022;12(1):6075."},{"issue":"8","key":"b5","series-title":"J Neurointerv Surg","first-page":"791","article-title":"A new combined parameter predicts re-treatment for coil-embolized aneurysms: a computational fluid dynamics multivariable analysis study","volume":"10","author":"Fujimura S","year":"2018","unstructured":"Fujimura S, Takao H, Suzuki T,  A new combined parameter predicts re-treatment for coil-embolized aneurysms: a computational fluid dynamics multivariable analysis study. 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Illustrative case","volume":"5","author":"Satoh T","year":"2023","unstructured":"Satoh T, Yasuhara T, Umakoshi M,  Trigeminal neuralgia caused by a persistent primitive trigeminal artery: preoperative three-dimensional multifusion imaging and computational fluid dynamics analysis. Illustrative case. J Neurosurg Case Lessons. 2023;5(19):CASE2381."},{"issue":"2","key":"b10","series-title":"Med Res Arch","article-title":"Peri-aneurysmal contact as a risk factor for aneurysmal rupture in unruptured intracranial aneurysms: an overview","volume":"12","author":"Satoh T","year":"2024","unstructured":"Satoh T, Sato Y, Sawada Y. Peri-aneurysmal contact as a risk factor for aneurysmal rupture in unruptured intracranial aneurysms: an overview. Med Res Arch. 2024;12(2)."},{"issue":"3","key":"b11","series-title":"Stroke","first-page":"745","article-title":"High shear stress and flow velocity in partially occluded aneurysms prone to recanalization","volume":"42","author":"Luo B","year":"2011","unstructured":"Luo B, Yang X, Wang S,  High shear stress and flow velocity in partially occluded aneurysms prone to recanalization. Stroke. 2011;42(3):745\u2013753."},{"issue":"10","key":"b12","series-title":"Stroke","first-page":"2541","article-title":"Blood flow into basilar tip aneurysms. A predictor for recanalization after coil embolization","volume":"47","author":"Sugiyama S","year":"2016","unstructured":"Sugiyama S, Niizuma K, Sato K,  Blood flow into basilar tip aneurysms. A predictor for recanalization after coil embolization. Stroke. 2016;47(10):2541\u20132547."},{"issue":"12","key":"b13","series-title":"PLoS One","first-page":"e0190222","article-title":"Computational fluid dynamics (CFD) using porous media modeling predicts recurrence after coiling of cerebral aneurysms","volume":"12","author":"Umeda Y","year":"2017","unstructured":"Umeda Y, Ishida F, Tsuji M,  Computational fluid dynamics (CFD) using porous media modeling predicts recurrence after coiling of cerebral aneurysms. PLoS One. 2017;12(12):e0190222."},{"issue":"12","key":"b14","series-title":"J Stroke Cerebrovasc Dis","first-page":"105290","article-title":"Assessing the hemodynamics in residual cavities of intracranial aneurysm after coil embolization with combined computational flow dynamics and silent magnetic resonance angiography","volume":"29","author":"Suzuki T","year":"2020","unstructured":"Suzuki T, Genkai N, Nomura T, Abe H. Assessing the hemodynamics in residual cavities of intracranial aneurysm after coil embolization with combined computational flow dynamics and silent magnetic resonance angiography. J Stroke Cerebrovasc Dis. 2020;29(12):105290."}],"container-title":["Journal of Neurosurgery: Case Lessons"],"original-title":[],"link":[{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg-case-lessons\/7\/16\/article-CASE24141.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg-case-lessons\/7\/16\/article-CASE24141.xml","content-type":"text\/html","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/thejns.org\/downloadpdf\/journals\/j-neurosurg-case-lessons\/7\/16\/article-CASE24141.xml","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,2,5]],"date-time":"2026-02-05T14:24:16Z","timestamp":1770301456000},"score":1,"resource":{"primary":{"URL":"https:\/\/thejns.org\/view\/journals\/j-neurosurg-case-lessons\/7\/16\/article-CASE24141.xml"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,4,15]]},"references-count":28,"journal-issue":{"issue":"16"},"URL":"https:\/\/doi.org\/10.3171\/case24141","relation":{},"ISSN":["2694-1902"],"issn-type":[{"value":"2694-1902","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,4,15]]}}}