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Image processing and model generation of the human nasal cavity and paranasal sinuses were performed using open-source and freeware software. 3-D Slicer was used primarily for segmentation and new surface model generation. Further processing was done using Autodesk<jats:sup>\u00ae<\/jats:sup> Meshmixer TM. The governing equations are discretized by means of the finite volume method. Subsequently, the corresponding algebraic equation systems were solved by OpenFOAM software.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>We described the protocol for the preparation of a 3-D model of the nasal cavity and paranasal sinuses and highlighted several problems that the future researcher may encounter. The CFD results were presented based on examples of 3-D models of the patient 1 (norm) and patient 2 (pathological changes).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The short training time for new user without a prior experience in image segmentation and 3-D mesh editing is an important advantage of this type of research. Both CBCT and CT are useful for model building. However, CBCT may have limitations. The <jats:italic>Q<\/jats:italic> criterion in CFD illustrates the considerable complication of the nasal flow and allows for direct evaluation and quantitative comparison of various flows and can be used for the assessment of nasal airflow.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00405-020-06428-3","type":"journal-article","created":{"date-parts":[[2020,10,17]],"date-time":"2020-10-17T12:03:19Z","timestamp":1602936199000},"page":"1443-1453","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Three-dimensional modeling and automatic analysis of the human nasal cavity and paranasal sinuses using the computational fluid dynamics method"],"prefix":"10.1007","volume":"278","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9251-4006","authenticated-orcid":false,"given":"Dmitry","family":"Tretiakow","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7033-1097","authenticated-orcid":false,"given":"Krzysztof","family":"Tesch","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8791-5497","authenticated-orcid":false,"given":"Jaros\u0142aw","family":"Meyer-Szary","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1984-2959","authenticated-orcid":false,"given":"Karolina","family":"Markiet","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0042-6314","authenticated-orcid":false,"given":"Andrzej","family":"Skorek","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,10,17]]},"reference":[{"issue":"4","key":"6428_CR1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.5604\/01.3001.0013.5462","volume":"8","author":"D Tretiakow","year":"2019","unstructured":"Tretiakow D, Skorek A (2019) Nasal septum turbinate and its significance for a rhinosurgeon. 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