High-Speed Holography for In-Vivo Measurement of Acoustically Induced Motions of Mammalian Tympanic Membrane

2016 ◽  
pp. 75-81 ◽  
Author(s):  
Payam Razavi ◽  
Jeffrey Tao Cheng ◽  
Cosme Furlong ◽  
John J. Rosowski
Keyword(s):  
Tympanic Membrane ◽  
High Speed ◽  
In Vivo Measurement

scholarly journals In Vivo Measurement of Human Tympanic Membrane Structure

2004 ◽  
Vol 131 (2) ◽  
pp. P142-P143
Author(s):  
Jen-Fang Yu ◽  
Yu-Che Cheng ◽  
Chung-Yi Lee ◽  
Jyh-Horng Chen ◽  
Hsin-Chung Lien ◽  
...  
Keyword(s):  
Tympanic Membrane ◽  
Membrane Structure ◽  
In Vivo Measurement ◽  
Human Tympanic Membrane

scholarly journals Biometric Measurement of Anterior Segment: A Review

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4285
Author(s):  
Bin Liu ◽  
Chengwei Kang ◽  
Fengzhou Fang
Keyword(s):  
High Speed ◽  
Anterior Segment ◽  
Future Research ◽  
Basic Principles ◽  
Human Eye ◽  
In Vivo Measurement ◽  
Research Perspectives ◽  
Scattering Effects ◽  
Fine Resolution

Biometric measurement of the anterior segment is of great importance for the ophthalmology, human eye modeling, contact lens fitting, intraocular lens design, etc. This paper serves as a comprehensive review on the historical development and basic principles of the technologies for measuring the geometric profiles of the anterior segment. Both the advantages and drawbacks of the current technologies are illustrated. For in vivo measurement of the anterior segment, there are two main challenges that need to be addressed to achieve high speed, fine resolution, and large range imaging. One is the motion artefacts caused by the inevitable and random human eye movement. The other is the serious multiple scattering effects in intraocular turbid media. The future research perspectives are also outlined in this paper.

scholarly journals Direct Measurement and Modeling of Intraglottal, Subglottal, and Vocal Fold Collision Pressures during Phonation in an Individual with a Hemilaryngectomy

2021 ◽  
Vol 11 (16) ◽  
pp. 7256
Author(s):  
Daryush D. Mehta ◽  
James B. Kobler ◽  
Steven M. Zeitels ◽  
Matías Zañartu ◽  
Emiro J. Ibarra ◽  
...  
Keyword(s):  
Vocal Fold ◽  
High Speed ◽  
Pressure Sensors ◽  
Pressure Probe ◽  
Surgical Removal ◽  
In Vivo Measurement ◽  
Dual Sensor ◽  
The Right ◽  
Collision Pressure

The purpose of this paper is to report on the first in vivo application of a recently developed transoral, dual-sensor pressure probe that directly measures intraglottal, subglottal, and vocal fold collision pressures during phonation. Synchronous measurement of intraglottal and subglottal pressures was accomplished using two miniature pressure sensors mounted on the end of the probe and inserted transorally in a 78-year-old male who had previously undergone surgical removal of his right vocal fold for treatment of laryngeal cancer. The endoscopist used one hand to position the custom probe against the surgically medialized scar band that replaced the right vocal fold and used the other hand to position a transoral endoscope to record laryngeal high-speed videoendoscopy of the vibrating left vocal fold contacting the pressure probe. Visualization of the larynx during sustained phonation allowed the endoscopist to place the dual-sensor pressure probe such that the proximal sensor was positioned intraglottally and the distal sensor subglottally. The proximal pressure sensor was verified to be in the strike zone of vocal fold collision during phonation when the intraglottal pressure signal exhibited three characteristics: an impulsive peak at the start of the closed phase, a rounded peak during the open phase, and a minimum value around zero immediately preceding the impulsive peak of the subsequent phonatory cycle. Numerical voice production modeling was applied to validate model-based predictions of vocal fold collision pressure using kinematic vocal fold measures. The results successfully demonstrated feasibility of in vivo measurement of vocal fold collision pressure in an individual with a hemilaryngectomy, motivating ongoing data collection that is designed to aid in the development of vocal dose measures that incorporate vocal fold impact collision and stresses.

In vivo measurement of retinal physiology with high-speed ultrahigh-resolution optical coherence tomography

2006 ◽  
Vol 31 (15) ◽  
pp. 2308 ◽  
Author(s):  
V. J. Srinivasan ◽  
M. Wojtkowski ◽  
J. G. Fujimoto ◽  
J. S. Duker
Keyword(s):  
Optical Coherence Tomography ◽  
High Speed ◽  
Optical Coherence ◽  
Ultrahigh Resolution ◽  
In Vivo Measurement

scholarly journals In vivo measurement of O2and CO2gas exchange across the human tympanic membrane

2009 ◽  
Vol 129 (7) ◽  
pp. 716-725 ◽  
Author(s):  
Sancak Yuksel ◽  
J. Douglas Swarts ◽  
Julianne Banks ◽  
James T. Seroky ◽  
William J. Doyle
Keyword(s):  
Tympanic Membrane ◽  
In Vivo Measurement ◽  
Human Tympanic Membrane

scholarly journals Ultraflexible, large-area, physiological temperature sensors for multipoint measurements

2015 ◽  
Vol 112 (47) ◽  
pp. 14533-14538 ◽  
Author(s):  
Tomoyuki Yokota ◽  
Yusuke Inoue ◽  
Yuki Terakawa ◽  
Jonathan Reeder ◽  
Martin Kaltenbrunner ◽  
...  
Keyword(s):  
High Speed ◽  
Temperature Stability ◽  
High Sensitivity ◽  
Thermal Sensors ◽  
Large Area ◽  
Active Matrix ◽  
In Vivo Measurement ◽  
Warm Blooded Animal ◽  
Acrylate Polymers

We report a fabrication method for flexible and printable thermal sensors based on composites of semicrystalline acrylate polymers and graphite with a high sensitivity of 20 mK and a high-speed response time of less than 100 ms. These devices exhibit large resistance changes near body temperature under physiological conditions with high repeatability (1,800 times). Device performance is largely unaffected by bending to radii below 700 µm, which allows for conformal application to the surface of living tissue. The sensing temperature can be tuned between 25 °C and 50 °C, which covers all relevant physiological temperatures. Furthermore, we demonstrate flexible active-matrix thermal sensors which can resolve spatial temperature gradients over a large area. With this flexible ultrasensitive temperature sensor we succeeded in the in vivo measurement of cyclic temperatures changes of 0.1 °C in a rat lung during breathing, without interference from constant tissue motion. This result conclusively shows that the lung of a warm-blooded animal maintains surprising temperature stability despite the large difference between core temperature and inhaled air temperature.

Noninvasive in vivo measurement of retinal physiology with high-speed ultrahigh resolution OCT

2006 ◽  
Author(s):  
V. J. Srinivasan ◽  
M. Wojtkowski ◽  
T. H. Ko ◽  
J. S. Duker ◽  
A. Clermont ◽  
...  
Keyword(s):  
High Speed ◽  
Ultrahigh Resolution ◽  
In Vivo Measurement

In vivo measurement of flatulence and nutrient digestibility in dogs fed poultry by-product meal, conventional soybean meal, and low-oligosaccharide low-phytate soybean meal

2006 ◽  
Vol 228 (2) ◽  
pp. 235-235
Author(s):  
Ryan M. Yamka ◽  
David L. Harmon ◽  
William D. Schoenherr ◽  
Christina Khoo ◽  
Kathy L. Gross ◽  
...  
Keyword(s):  
Soybean Meal ◽  
Nutrient Digestibility ◽  
In Vivo Measurement

In Vitro and In Vivo Measurement of Percutaneous Penetration of Low Molecular Weight Toxins of Military Interest

1989 ◽  
Author(s):  
B. W. Kemppainen ◽  
M. Mehta ◽  
R. G. Stafford ◽  
R. T. Riley ◽  
C. R. Clark
Keyword(s):  
Molecular Weight ◽  
Percutaneous Penetration ◽  
Low Molecular Weight ◽  
In Vivo Measurement
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