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Here, we employed multiscale X-ray and fluorescence imaging for quantitative assessment of scala tympani, vestibuli, and media, as well as the spiral ganglion in Rosenthal\u2019s canal for various species commonly used in auditory research. Furthermore, we demonstrate the feasibility of oCI implantation for rodents and marmosets, as a nonhuman primate model. Using modeling of light propagation from the emitters of the oCI, we estimate the frequency selectivity and range covered by optical stimulation within the cochlea.<\/jats:p>","DOI":"10.1073\/pnas.2014472118","type":"journal-article","created":{"date-parts":[[2021,4,26]],"date-time":"2021-04-26T17:00:12Z","timestamp":1619456412000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":39,"title":["Multiscale photonic imaging of the native and implanted cochlea"],"prefix":"10.1073","volume":"118","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2638-8731","authenticated-orcid":false,"given":"Daniel","family":"Keppeler","sequence":"first","affiliation":[{"name":"Institute for Auditory Neuroscience, University Medical Center G\u00f6ttingen, 37075 G\u00f6ttingen, Germany;"},{"name":"InnerEarLab, University Medical Center G\u00f6ttingen, 37075 G\u00f6ttingen, 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