{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T11:30:03Z","timestamp":1761823803860},"reference-count":13,"publisher":"FapUNIFESP (SciELO)","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arq. Neuro-Psiquiatr."],"published-print":{"date-parts":[[2016,5]]},"abstract":"<jats:p>ABSTRACT We proposed a 3D model to evaluate the role of platybasia and clivus length in the development of Chiari I (CI). Using a computer aided design software, two DICOM files of a normal CT scan and MR were used to simulate different clivus lengths (CL) and also different basal angles (BA). The final posterior fossa volume (PFV) was obtained for each variation and the percentage of the volumetric change was acquired with the same method. The initial normal values of CL and BA were 35.65 mm and 112.66\u00ba respectively, with a total PFV of 209 ml. Ranging the CL from 34.65 to 29.65 \u2013 24.65 \u2013 19.65, there was a PFV decrease of 0.47% \u2013 1.12% \u2013 1.69%, respectively. Ranging the BA from 122.66\u00ba to 127.66\u00ba \u2013 142.66\u00ba, the PFV decreased 0.69% \u2013 3.23%, respectively. Our model highlights the importance of the basal angle and clivus length to the development of CI.<\/jats:p>","DOI":"10.1590\/0004-282x20160041","type":"journal-article","created":{"date-parts":[[2016,5,14]],"date-time":"2016-05-14T11:09:39Z","timestamp":1463224179000},"page":"405-408","source":"Crossref","is-referenced-by-count":9,"title":["3-D simulation of posterior fossa reduction in Chiari I"],"prefix":"10.1590","volume":"74","author":[{"given":"Yvens Barbosa","family":"Fernandes","sequence":"first","affiliation":[{"name":"Hospital Municipal M\u00e1rio Gatti,  Brasil; Universidade Estadual de Campinas,  Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pedro F\u00e1bio Mendon\u00e7a","family":"Perestrelo","sequence":"additional","affiliation":[{"name":"Centro de Tecnologia de Informa\u00e7\u00e3o Renato Archer,  Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pedro Yoshito","family":"Noritomi","sequence":"additional","affiliation":[{"name":"Centro de Tecnologia de Informa\u00e7\u00e3o Renato Archer,  Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roger Neves","family":"Mathias","sequence":"additional","affiliation":[{"name":"Universidade Estadual de Campinas,  Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jorge Vicente Lopes da","family":"Silva","sequence":"additional","affiliation":[{"name":"Centro de Tecnologia de Informa\u00e7\u00e3o Renato Archer,  Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrei Fernandes","family":"Joaquim","sequence":"additional","affiliation":[{"name":"Hospital Municipal M\u00e1rio Gatti,  Brasil; 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