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Journal of Biomedical Optics

Optoelectronic holographic otoscope for measurement of nano-displacements in tympanic membranes
Author(s): María del Socorro Hernández-Montes; Cosme Furlong; John J. Rosowski; Nesim Hulli; Ellery Harrington; Jeffrey Tao Cheng; Michael E. Ravicz; Fernando Mendoza-Santoyo
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Paper Abstract

Current methodologies for characterizing tympanic membrane (TM) motion are usually limited to either average acoustic estimates (admittance or reflectance) or single-point mobility measurements, neither of which suffices to characterize the detailed mechanical response of the TM to sound. Furthermore, while acoustic and single-point measurements may aid in diagnosing some middle-ear disorders, they are not always useful. Measurements of the motion of the entire TM surface can provide more information than these other techniques and may be superior for diagnosing pathology. We present advances in our development of a new compact optoelectronic holographic otoscope (OEHO) system for full field-of-view characterization of nanometer-scale sound-induced displacements of the TM surface at video rates. The OEHO system consists of a fiber optic subsystem, a compact otoscope head, and a high-speed image processing computer with advanced software for recording and processing holographic images coupled to a computer-controlled sound-stimulation and recording system. A prototype OEHO system is in use in a medical research environment to address basic science questions regarding TM function. The prototype provides real-time observation of sound-induced TM displacement patterns over a broad frequency range. Representative time-averaged and stroboscopic holographic interferometry results in animals and human cadaver samples are shown, and their potential utility is discussed.

Paper Details

Date Published: 1 May 2009
PDF: 9 pages
J. Biomed. Opt. 14(3) 034023 doi: 10.1117/1.3153898
Published in: Journal of Biomedical Optics Volume 14, Issue 3
Show Author Affiliations
María del Socorro Hernández-Montes, Ctr. de Investigaciones en Óptica, A.C. (Mexico)
Cosme Furlong, Worcester Polytechnic Institute (United States)
John J. Rosowski, Massachusetts General Hospital (United States)
Nesim Hulli, Worcester Polytechnic Institute (United States)
Ellery Harrington, Worcester Polytechnic Institute (United States)
Jeffrey Tao Cheng, Massachusetts General Hospital (United States)
Michael E. Ravicz, Massachusetts General Hospital (United States)
Fernando Mendoza-Santoyo, Ctr. de Investigaciones en Óptica, A.C. (Mexico)

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