{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,26]],"date-time":"2026-10-26T19:24:45Z","timestamp":1793042685250,"version":"4.5.0"},"reference-count":32,"publisher":"Springer Science and Business Media LLC","issue":"10","license":[{"start":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T00:00:00Z","timestamp":1618444800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"},{"start":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T00:00:00Z","timestamp":1618444800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"}],"funder":[{"DOI":"10.13039\/501100001349","name":"National Medical Research Council","doi-asserted-by":"crossref","award":["NMRC\/TA\/0024\/2013; MOH-CSAINV18nov-0005"],"award-info":[{"award-number":["NMRC\/TA\/0024\/2013; MOH-CSAINV18nov-0005"]}],"id":[{"id":"10.13039\/501100001349","id-type":"DOI","asserted-by":"crossref"}]},{"name":"National Neuroscience Institute Centre Grant","award":["NCG CS03; IRNMR17CBG01"],"award-info":[{"award-number":["NCG CS03; IRNMR17CBG01"]}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Neuroradiology"],"published-print":{"date-parts":[[2021,10]]},"DOI":"10.1007\/s00234-021-02698-8","type":"journal-article","created":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T15:03:45Z","timestamp":1618499025000},"page":"1689-1699","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The topology of ventricle surfaces and its application in the analysis of hydrocephalic ventricles: a proof-of-concept study"],"prefix":"10.1007","volume":"63","author":[{"given":"Yu Tung","family":"Lo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sumeet","family":"Kumar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leanne Qiaojing","family":"Tan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine","family":"Lock","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1250-2441","authenticated-orcid":false,"given":"Nicole Chwee Har","family":"Keong","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,4,15]]},"reference":[{"key":"2698_CR1","doi-asserted-by":"publisher","first-page":"931","DOI":"10.1001\/archneurpsyc.1942.02290060069004","volume":"47","author":"WA Evans","year":"1942","unstructured":"Evans WA (1942) An encephalographic ratio for estimating ventricular enlargement and cerebral atrophy. Arch Neurol Psychiatr 47:931\u2013937. https:\/\/doi.org\/10.1001\/archneurpsyc.1942.02290060069004","journal-title":"Arch Neurol Psychiatr"},{"key":"2698_CR2","doi-asserted-by":"publisher","first-page":"178","DOI":"10.3171\/2013.8.JNS13575","volume":"120","author":"J Virhammar","year":"2014","unstructured":"Virhammar J, Laurell K, Cesarini KG, Larsson EM (2014) The callosal angle measured on MRI as a predictor of outcome in idiopathic normal-pressure hydrocephalus. J Neurosurg 120:178\u2013184. https:\/\/doi.org\/10.3171\/2013.8.JNS13575","journal-title":"J Neurosurg"},{"key":"2698_CR3","doi-asserted-by":"publisher","first-page":"396","DOI":"10.1111\/j.1600-0404.1973.tb01312.x","volume":"49","author":"O Sjaastad","year":"1973","unstructured":"Sjaastad O, Nordvik A (1973) The corpus callosal angle in the diagnosis of cerebral ventricular enlargement. Acta Neurol Scand 49:396\u2013406. https:\/\/doi.org\/10.1111\/j.1600-0404.1973.tb01312.x","journal-title":"Acta Neurol Scand"},{"key":"2698_CR4","doi-asserted-by":"publisher","first-page":"2262","DOI":"10.3174\/ajnr.A4440","volume":"36","author":"S Yamada","year":"2015","unstructured":"Yamada S, Ishikawa M, Yamamot K (2015) Optimal diagnostic indices for idiopathic normal pressure hydrocephalus based on the 3D quantitative volumetric analysis for the cerebral ventricle and subarachnoid space. Am J Neuroradiol 36:2262\u20132269. https:\/\/doi.org\/10.3174\/ajnr.A4440","journal-title":"Am J Neuroradiol"},{"issue":"7","key":"2698_CR5","first-page":"1277","volume":"19","author":"H Kitagaki","year":"1998","unstructured":"Kitagaki H, Mori E, Ishii K et al (1998) CSF spaces in idiopathic normal pressure hydrocephalus: Morphology and volumetry. AJNR Am J Neuroradiol 19(7):1277\u20131284","journal-title":"AJNR Am J Neuroradiol"},{"key":"2698_CR6","doi-asserted-by":"publisher","first-page":"E11","DOI":"10.3171\/2016.7.FOCUS16194","volume":"41","author":"NCH Keong","year":"2016","unstructured":"Keong NCH, Pena A, Price SJ et al (2016) Imaging normal pressure hydrocephalus: theories, techniques, and challenges. Neurosurg Focus 41:E11. https:\/\/doi.org\/10.3171\/2016.7.FOCUS16194","journal-title":"Neurosurg Focus"},{"key":"2698_CR7","first-page":"76","volume":"27","author":"WM Palm","year":"2006","unstructured":"Palm WM, Walchenbach R, Bruinsma B, Admiraal-Behloul F, Middelkoop HA, Launer LJ, van der Grond J, van Buchem M (2006) Intracranial compartment volumes in normal pressure hydrocephalus: volumetric assessment versus outcome. Am J Neuroradiol 27:76\u201379","journal-title":"Am J Neuroradiol"},{"key":"2698_CR8","doi-asserted-by":"publisher","first-page":"e0181624","DOI":"10.1371\/journal.pone.0181624","volume":"12","author":"NC Keong","year":"2017","unstructured":"Keong NC, Pena A, Price SJ, Czosnyka M, Czosnyka Z, DeVito EE, Housden CR, Sahakian BJ, Pickard JD (2017) Diffusion tensor imaging profiles reveal specific neural tract distortion in normal pressure hydrocephalus. PLoS One 12:e0181624. https:\/\/doi.org\/10.1371\/journal.pone.0181624","journal-title":"PLoS One"},{"key":"2698_CR9","doi-asserted-by":"publisher","first-page":"360","DOI":"10.1111\/j.1552-6569.2002.tb00145.x","volume":"12","author":"A Pe\u00f1a","year":"2002","unstructured":"Pe\u00f1a A, Owler BK, Fryer TD, Minhas P, Czosnyka M, Crawford PJ, Pickard JD (2002) A case study of hemispatial neglect using finite element analysis and positron emission tomography. J Neuroimaging 12:360\u2013367. https:\/\/doi.org\/10.1111\/j.1552-6569.2002.tb00145.x","journal-title":"J Neuroimaging"},{"key":"2698_CR10","doi-asserted-by":"publisher","first-page":"S2-4","DOI":"10.1227\/01.NEU.0000168185.29659.C5LK","volume":"57","author":"N Relkin","year":"2005","unstructured":"Relkin N, Marmarou A, Klinge P et al (2005) INPH guidelines, part II: diagnosing idio-pathic normal-pressure hydrocephalus. Neurosurgery 57:S2-4\u2013S2-16. https:\/\/doi.org\/10.1227\/01.NEU.0000168185.29659.C5LK","journal-title":"Neurosurgery"},{"key":"2698_CR11","doi-asserted-by":"publisher","unstructured":"Morris JC (1997) Clinical dementia rating: a reliable and valid diagnostic and staging measure for dementia of the Alzheimer type. In: International Psychogeriatrics. Int Psychogeriatr 9(Suppl 1):173\u2013176; discussion 177\u20138. https:\/\/doi.org\/10.1017\/s1041610297004870","DOI":"10.1017\/s1041610297004870"},{"key":"2698_CR12","doi-asserted-by":"publisher","first-page":"263","DOI":"10.1016\/j.jalz.2011.03.005","volume":"7","author":"GM McKhann","year":"2011","unstructured":"McKhann GM, Knopman DS, Chertkow H et al (2011) The diagnosis of dementia due to Alzheimer\u2019s disease: recommendations from the National Institute on Aging-Alzheimer\u2019s Association workgroups on diagnostic guidelines for Alzheimer\u2019s disease. Alzheimers Dement 7:263\u2013269. https:\/\/doi.org\/10.1016\/j.jalz.2011.03.005","journal-title":"Alzheimers Dement"},{"key":"2698_CR13","doi-asserted-by":"crossref","unstructured":"Petersen RC, Aisen PC, Beckett LA, Donohue MC, Gamst AC, Harvey DJ, Jack CR, Jagust WJ, Shaw LM, Toga AW, Trojanowski JQ, Weiner MW (2010) Alzheimer's disease neuroimaging initiative (ADNI): Clinical characterization. Neurology 74 (3):201\u2013209","DOI":"10.1212\/WNL.0b013e3181cb3e25"},{"key":"2698_CR14","doi-asserted-by":"publisher","unstructured":"Kikinis R, Pieper SD, Vosburgh KG (2014) 3D Slicer: A platform for subject-specific image analysis, visualization, and clinical support. In: Jolesz F. (eds) Intraoperative imaging and image-guided therapy. Springer, New York, NY. https:\/\/doi.org\/10.1007\/978-1-4614-7657-3_19","DOI":"10.1007\/978-1-4614-7657-3_19"},{"key":"2698_CR15","doi-asserted-by":"publisher","first-page":"564","DOI":"10.1093\/ehjci\/jev171","volume":"17","author":"K Addetia","year":"2016","unstructured":"Addetia K, Maffessanti F, Yamat M, Weinert L, Narang A, Freed BH, Mor-Avi V, Lang RM (2016) Three-dimensional echocardiography-based analysis of right ventricular shape in pulmonary arterial hypertension. Eur Heart J Cardiovasc Imaging 17:564\u2013575. https:\/\/doi.org\/10.1093\/ehjci\/jev171","journal-title":"Eur Heart J Cardiovasc Imaging"},{"key":"2698_CR16","doi-asserted-by":"publisher","first-page":"614","DOI":"10.1016\/j.echo.2017.12.009","volume":"31","author":"K Addetia","year":"2018","unstructured":"Addetia K, Maffessanti F, Muraru D, Singh A, Surkova E, Mor-Avi V, Badano LP, Lang RM (2018) Morphologic analysis of the normal right ventricle using three-dimensional echocardiography\u2013derived curvature indices. J Am Soc Echocardiogr 31:614\u2013623. https:\/\/doi.org\/10.1016\/j.echo.2017.12.009","journal-title":"J Am Soc Echocardiogr"},{"key":"2698_CR17","doi-asserted-by":"publisher","unstructured":"Musy M, Dalmasso G, Bane S (2019) vtkplotter, a python module for scientific visualization and analysis of 3D objects and point clouds based on VTK (Visualization Toolkit), Zenodo.\u00a0https:\/\/doi.org\/10.5281\/zenodo.2561402","DOI":"10.5281\/zenodo.2561402"},{"key":"2698_CR18","doi-asserted-by":"publisher","unstructured":"Garland M, Heckbert PS (1997) Surface simplification using quadric error metrics. Proc 24th Annu Conf Comput Graph Interact Tech SIGGRAPH 1997 209\u2013216. https:\/\/doi.org\/10.1145\/258734.258849","DOI":"10.1145\/258734.258849"},{"key":"2698_CR19","doi-asserted-by":"publisher","first-page":"1073","DOI":"10.1007\/s10554-011-9913-3","volume":"28","author":"MA Sciancalepore","year":"2012","unstructured":"Sciancalepore MA, Maffessanti F, Patel AR, Gomberg-Maitland M, Chandra S, Freed BH, Caiani EG, Lang RM, Mor-Avi V (2012) Three-dimensional analysis of interventricular septal curvature from cardiac magnetic resonance images for the evaluation of patients with pulmonary hypertension. Int J Card Imaging 28:1073\u20131085. https:\/\/doi.org\/10.1007\/s10554-011-9913-3","journal-title":"Int J Card Imaging"},{"key":"2698_CR20","unstructured":"Batchelor P, Maclean A, Batchelor P, Maclean A (2020) vtkCurvatures class reference"},{"key":"2698_CR21","doi-asserted-by":"publisher","unstructured":"Mesmoudi MM, De Floriani L, Magillo P (2012) Concentrated curvature for mean curvature estimation in triangulated surfaces. Lect Notes Comput Sci (including Subser Lect Notes Artif Intell Lect Notes Bioinformatics) 7309 LNCS:79\u201387. https:\/\/doi.org\/10.1007\/978-3-642-30238-1_9","DOI":"10.1007\/978-3-642-30238-1_9"},{"key":"2698_CR22","unstructured":"Gray A, Abbena E, Salamon S (2017) Modern differential geometry of curves and surfaces with Mathematica, 3rd Edition"},{"key":"2698_CR23","doi-asserted-by":"publisher","first-page":"148","DOI":"10.1016\/j.cam.2005.04.054","volume":"192","author":"D Rypl","year":"2006","unstructured":"Rypl D, Bittnar Z (2006) Generation of computational surface meshes of STL models. J Comput Appl Math 192:148\u2013151. https:\/\/doi.org\/10.1016\/j.cam.2005.04.054","journal-title":"J Comput Appl Math"},{"key":"2698_CR24","unstructured":"Dyn N, Hormann K, Kim S, Levin D (2001) Optimizing 3D triangulations using discrete curvature analysis. Mathematical Methods for Curves and Surfaces: Oslo 2000 135. Tom Lyche and Larry L. Schumaker (eds.), pp. 135\u2013146"},{"key":"2698_CR25","doi-asserted-by":"publisher","first-page":"2678","DOI":"10.1007\/s00330-008-1044-4","volume":"18","author":"K Ishii","year":"2008","unstructured":"Ishii K, Kanda T, Harada A, Miyamoto N, Kawaguchi T, Shimada K, Ohkawa S, Uemura T, Yoshikawa T, Mori E (2008) Clinical impact of the callosal angle in the diagnosis of idiopathic normal pressure hydrocephalus. Eur Radiol 18:2678\u20132683. https:\/\/doi.org\/10.1007\/s00330-008-1044-4","journal-title":"Eur Radiol"},{"key":"2698_CR26","doi-asserted-by":"publisher","first-page":"395","DOI":"10.1136\/jnnp.2006.096164","volume":"78","author":"M Matar\u00f3","year":"2007","unstructured":"Matar\u00f3 M, Matar\u00edn M, Poca MA et al (2007) Functional and magnetic resonance imaging correlates of corpus callosum in normal pressure hydrocephalus before and after shunting. J Neurol Neurosurg Psychiatry 78:395\u2013398. https:\/\/doi.org\/10.1136\/jnnp.2006.096164","journal-title":"J Neurol Neurosurg Psychiatry"},{"key":"2698_CR27","doi-asserted-by":"publisher","first-page":"328","DOI":"10.1111\/j.1600-0404.2007.00906.x","volume":"116","author":"EE DeVito","year":"2007","unstructured":"DeVito EE, Salmond CH, Owler BK et al (2007) Caudate structural abnormalities in idiopathic normal pressure hydrocephalus. Acta Neurol Scand 116:328\u2013332. https:\/\/doi.org\/10.1111\/j.1600-0404.2007.00906.x","journal-title":"Acta Neurol Scand"},{"key":"2698_CR28","doi-asserted-by":"publisher","first-page":"198","DOI":"10.3174\/ajnr.A0739","volume":"29","author":"GA Bateman","year":"2008","unstructured":"Bateman GA (2008) The pathophysiology of idiopathic normal pressure hydrocephalus: cerebral ischemia or altered venous hemodynamics? Am J Neuroradiol 29:198\u2013203. https:\/\/doi.org\/10.3174\/ajnr.A0739","journal-title":"Am J Neuroradiol"},{"key":"2698_CR29","doi-asserted-by":"crossref","unstructured":"Zhong L, Yeo SY, Su Y, et al (2007) Regional assessment of left ventricular surface shape from magnetic resonance imaging. In: Annual International Conference of the IEEE Engineering in Medicine and Biology \u2013 Proceedings, pp 884\u2013887","DOI":"10.1109\/IEMBS.2007.4352432"},{"key":"2698_CR30","first-page":"0","volume":"836","author":"R Garimella","year":"2003","unstructured":"Garimella R, Swartz B (2003) Curvature estimation for unstructured triangulations of surfaces. Los Alamos Natl Lab 836:0\u201310","journal-title":"Los Alamos Natl Lab"},{"key":"2698_CR31","doi-asserted-by":"publisher","unstructured":"Batagelo HC, Wu ST (2007) Estimating curvatures and their derivatives on meshes of arbitrary topology from sampling directions.\u00a0Visual Comput\u00a023:803\u2013812. https:\/\/doi.org\/10.1007\/s00371-007-0133-8","DOI":"10.1007\/s00371-007-0133-8"},{"key":"2698_CR32","doi-asserted-by":"crossref","unstructured":"Alliez P, Cohen-Steiner D, Devillers O, et al (2003) Anisotropic polygonal remeshing. ACM Transactions on Graphics, Association for Computing Machinery\u00a022(3):485\u2013493","DOI":"10.1145\/882262.882296"}],"container-title":["Neuroradiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00234-021-02698-8.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00234-021-02698-8\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00234-021-02698-8.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,9,23]],"date-time":"2021-09-23T10:38:18Z","timestamp":1632393498000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s00234-021-02698-8"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,4,15]]},"references-count":32,"journal-issue":{"issue":"10","published-print":{"date-parts":[[2021,10]]}},"alternative-id":["2698"],"URL":"https:\/\/doi.org\/10.1007\/s00234-021-02698-8","relation":{},"ISSN":["0028-3940","1432-1920"],"issn-type":[{"value":"0028-3940","type":"print"},{"value":"1432-1920","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,4,15]]},"assertion":[{"value":"29 November 2020","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"22 March 2021","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"15 April 2021","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare that they have no additional conflict of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"The study was approved by the National Healthcare Group Domain Specific Review Board (Ref 2014\/00838) and the SingHealth Centralised Institutional Review Board (Ref 2016\/2627).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Informed consent was obtained from all individual participants included in the study.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Informed consent"}}]}}