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Journal of Biomedical Optics

Two-photon microscopy of the mouse cochlea in situ for cellular diagnosis
Author(s): Xin Yang; Ye Pu; Chia-Lung Hsieh; Cheng Ai Ong; Demetri Psaltis; Konstantina M. Stankovic
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Paper Abstract

Sensorineural hearing loss is the most common type of hearing loss worldwide, yet the underlying cause is typically unknown because the inner ear cannot be biopsied today without destroying hearing, and intracochlear cells have not been imaged with resolution sufficient to establish diagnosis. Intracochlear imaging has been technologically challenging because of the cochlea's small size and encasement in bone. We report, for the first time, imaging of the mouse cochlea in situ without exogenous dyes, through a membranous round window, using a near-infrared femtosecond laser as the excitation and endogenous two-photon excitation fluorescence (TPEF) and second harmonic generation as the contrast mechanisms. We find that TPEF exhibits strong contrast allowing cellular, and even subcellular resolution, and detection of specific, noise-induced pathologic changes. Our results demonstrate that the round window provides a useful access to the cochlea through the middle ear, and they motivate future development of a new and efficient diagnostic tool based on two-photon micro-endoscopy.

Paper Details

Date Published: 19 November 2012
PDF: 7 pages
J. Biomed. Opt. 18(3) 031104 doi: 10.1117/1.JBO.18.3.031104
Published in: Journal of Biomedical Optics Volume 18, Issue 3
Show Author Affiliations
Xin Yang, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Ye Pu, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Chia-Lung Hsieh, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Cheng Ai Ong, Massachusetts Eye and Ear Infirmary (United States)
Demetri Psaltis, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Konstantina M. Stankovic, Massachusetts Eye and Ear Infirmary (United States)

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