scholarly journals Imaging the Human Tympanic Membrane Using Optical Coherence Tomography In Vivo

2008 ◽  
Vol 29 (8) ◽  
pp. 1091-1094 ◽  
Author(s):  
Hamid R. Djalilian ◽  
James Ridgway ◽  
Majestic Tam ◽  
Ali Sepehr ◽  
Zhongping Chen ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Tympanic Membrane ◽  
Optical Coherence ◽  
Human Tympanic Membrane

scholarly journals In vivo 3D imaging of the human tympanic membrane using a wide-field diagonal-scanning optical coherence tomography probe

2017 ◽  
Vol 56 (9) ◽  
pp. D115 ◽  
Author(s):  
Kibeom Park ◽  
Nam Hyun Cho ◽  
Jeong Hun Jang ◽  
Sang Heun Lee ◽  
Pilun Kim ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Tympanic Membrane ◽  
3D Imaging ◽  
Wide Field ◽  
Optical Coherence ◽  
Human Tympanic Membrane

scholarly journals Full-Field Thickness Distribution of Human Tympanic Membrane Obtained with Optical Coherence Tomography

2013 ◽  
Vol 14 (4) ◽  
pp. 483-494 ◽  
Author(s):  
Sam Van der Jeught ◽  
Joris J. J. Dirckx ◽  
Johan R. M. Aerts ◽  
Adrian Bradu ◽  
Adrian Gh Podoleanu ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Tympanic Membrane ◽  
Thickness Distribution ◽  
Optical Coherence ◽  
Full Field ◽  
Human Tympanic Membrane

scholarly journals Measurement of Vibrating Tympanic Membrane in an In Vivo Mouse Model Using Doppler Optical Coherence Tomography

2019 ◽  
Vol 5 (9) ◽  
pp. 74
Author(s):  
Jeon ◽  
Kim ◽  
Jeon ◽  
Kim
Keyword(s):  
Optical Coherence Tomography ◽  
Phase Shift ◽  
Tympanic Membrane ◽  
Middle Ear ◽  
Acoustic Stimulus ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Vibratory Motion ◽  
Doppler Optical Coherence Tomography

Optical coherence tomography (OCT) has a micro-resolution with a penetration depth of about 2 mm and field of view of about 10 mm. This makes OCT well suited for analyzing the anatomical and internal structural assessment of the middle ear. To study the vibratory motion of the tympanic membrane (TM) and its internal structure, we developed a phase-resolved Doppler OCT system using Kasai’s autocorrelation algorithm. Doppler optical coherence tomography is a powerful imaging tool which can offer the micro-vibratory measurement of the tympanic membrane and obtain the micrometer-resolved cross-sectional images of the sample in real-time. To observe the relative vibratory motion of individual sections (malleus, thick regions, and the thin regions of the tympanic membrane) of the tympanic membrane in respect to auditory signals, we designed an experimental study for measuring the difference in Doppler phase shift for frequencies varying from 1 to 8 kHz which were given as external stimuli to the middle ear of a small animal model. Malleus is the very first interconnecting region between the TM and cochlea. In our proposed study, we observed that the maximum change in Doppler phase shift was seen for the 4 kHz acoustic stimulus in the malleus, the thick regions, and in the thin regions of the tympanic membrane. In particular, the vibration signals were higher in the malleus in comparison to the tympanic membrane.

Detection of tympanic membrane movement using film patch with integrated strain gauge, assessed by optical coherence tomography: experimental study

2011 ◽  
Vol 125 (5) ◽  
pp. 467-473 ◽  
Author(s):  
T Just ◽  
T Zehlicke ◽  
O Specht ◽  
W Sass ◽  
C Punke ◽  
...  
Keyword(s):  
Experimental Study ◽  
Optical Coherence Tomography ◽  
Tympanic Membrane ◽  
Middle Ear ◽  
Strain Gauge ◽  
Ex Vivo ◽  
Optical Coherence ◽  
Middle Ear Pressure ◽  
Pressure Changes

AbstractObjective:We report an ex vivo and in vivo experimental study of a device designed to measure tympanic membrane movement under normal and pathological conditions, assessed using optical coherence tomography.Materials and methods:We designed two types of flexible, round film patch with integrated strain gauge, to be attached to the tympanic membrane in order to measure tympanic membrane movement. Tympanic membrane attachment was assessed using optical coherence tomography. The devices were tested experimentally using an ex vivo model with varying middle-ear pressure.Results:Optical coherence tomography reliably assessed attachment of the film patch to the tympanic membrane, before and after middle-ear pressure changes. Strain gauge voltage changes were directly proportional to middle-ear pressure recordings, for low pressure changes. Tympanic membrane perforations smaller than 2 mm could be sealed off with the film patch.Conclusion:Attachment of the film patch with integrated strain gauge to the tympanic membrane was not ideal. Nevertheless, the strain gauge was able to precisely detect small pressure changes within the middle ear, in this experimental model.

Investigation of the human tympanic membrane oscillationex vivoby Doppler optical coherence tomography

2012 ◽  
Vol 7 (6) ◽  
pp. 434-441 ◽  
Author(s):  
Anke Burkhardt ◽  
Lars Kirsten ◽  
Matthias Bornitz ◽  
Thomas Zahnert ◽  
Edmund Koch
Keyword(s):  
Optical Coherence Tomography ◽  
Tympanic Membrane ◽  
Optical Coherence ◽  
Doppler Optical Coherence Tomography ◽  
Human Tympanic Membrane

scholarly journals Optical assessment of the in vivo tympanic membrane status using a handheld optical coherence tomography-based otoscope

2017 ◽  
Vol 138 (4) ◽  
pp. 367-374 ◽  
Author(s):  
Kibeom Park ◽  
Nam Hyun Cho ◽  
Mansik Jeon ◽  
Sang Heun Lee ◽  
Jeong Hun Jang ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Tympanic Membrane ◽  
Optical Coherence

scholarly journals Imaging birefringent tissue in the human tympanic membrane by polarization-sensitive optical coherence tomography

2020 ◽  
Vol 238 ◽  
pp. 04008
Author(s):  
Svea Steuer ◽  
Jonas Golde ◽  
Steffen Ossmann ◽  
Lars Kirsten ◽  
Joseph Morgenstern ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Optical Coherence Tomography ◽  
Connective Tissue ◽  
Tympanic Membrane ◽  
Imaging Technique ◽  
Diagnostic Methods ◽  
Middle Ear Surgery ◽  
Optical Coherence ◽  
Ear Surgery ◽  
Human Tympanic Membrane

Acousto-mechanical properties of the human tympanic membrane mainly depend on the connective tissue in its layered structure. Using polarization-sensitive optical coherence tomography, a depth-resolved imaging technique which provides additional tissue specific contrast, polarization changes of the birefringent layers in the human tympanic membrane were detected. By depicting estimated local retardances, distinguishing different tissue types was possible. This suggests the ability to image pathological alterations of the connective tissue with PSOCT, which extends the conventional diagnostic methods in middle ear surgery.

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