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While precise anatomic characterization is essential for a multitude of applications, comprehensive reference dimensions of both osseous and membranous cochlear structure obtained from a large and morphologically heterogeneous sample set do not currently exist. In this study, one hundred healthy human cadaveric temporal bone samples, without historical or visible pathology, underwent high\u2010resolution three\u2010dimensional synchrotron radiation phase\u2010contrast imaging (SR\u2010PCI) to develop a morphometric compendium of the human cochlea. Measurements of both bone and soft tissue in the cochlea were obtained, including basal turn diameter and width, cochlear height, and cochlear length along multiple anatomic paths (lateral wall, basilar membrane, and modiolar wall). The hook region, scalar geometry (diameter, area, tilt, width, and volume), and round window dimensions were also comprehensively characterized. Normative tonotopic frequency distributions of the basilar membrane and spiral ganglion were derived using cochlear length measurements and Greenwood's frequency\u2013position function. These anatomic benchmarks establish invaluable reference data which may be used for anatomically informed, precision medicine approaches, including patient\u2010specific surgical planning, intracochlear pharmaceutical delivery optimization, the development of automated image analysis algorithms, and the investigation of cochlear structure\u2013function relationships in pathological conditions.<\/jats:p>","DOI":"10.1111\/joa.70175","type":"journal-article","created":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T04:11:09Z","timestamp":1778645469000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The cochlear morphometry compendium: High\u2010resolution synchrotron measurements and normative reference values"],"prefix":"10.1111","author":[{"given":"Sumit K.","family":"Agrawal","sequence":"first","affiliation":[{"name":"Department of Medical Biophysics Western University  London Ontario 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