Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Timothy A. Stiles"'
Autor:
David T. Fetzer, Ivan M. Rosado-Mendez, Michael Wang, Michelle L. Robbin, Arinc Ozturk, Keith A. Wear, Juvenal Ormachea, Timothy A. Stiles, J. Brian Fowlkes, Timothy J. Hall, Anthony E. Samir
Publikováno v:
Radiology. 305(2)
Excessive liver fat (steatosis) is now the most common cause of chronic liver disease worldwide and is an independent risk factor for cirrhosis and associated complications. Accurate and clinically useful diagnosis, risk stratification, prognosticati
Publikováno v:
The Journal of the Acoustical Society of America. 152:A253-A253
Kettering University has an experiential learning model in which students typically alternate between academic and cooperative work terms every quarter during their entire undergraduate degree program. In this approach, industrial partners play a par
Publikováno v:
The Journal of the Acoustical Society of America. 151:A246-A246
We have designed and started construction of an instrument that will be able to operate as both a scanning acoustic microscope and photoacoustic microscope. To keep costs down, we are using open-source hardware and software components wherever possib
Autor:
Clayton Sparks, Timothy A. Stiles
Publikováno v:
The Journal of the Acoustical Society of America. 148:2520-2520
Autor:
Timothy A. Stiles
Publikováno v:
American Journal of Physics. 82:490-501
Ultrasound imaging provides an interesting and accessible example of the intersection between biology, medicine, and physics. This article provides a review of the physics and technology currently available and discusses two recent methods that have
Instrument for determining the complex shear modulus of soft-tissue-like materials from 10 to 300 Hz
Autor:
Timothy A. Stiles, Maritza A. Hobson, Timothy J. Hall, Jingfeng Jiang, Gary R. Frank, Ernest L. Madsen, Sheng Lin-Gibson
Publikováno v:
Physics in Medicine and Biology. 53:5313-5342
Accurate determination of the complex shear modulus of soft tissues and soft-tissue-like materials in the 10–300 Hz frequency range is very important to researchers in MR elastography and acoustic radiation force impulse (ARFI) imaging. A variety o
Publikováno v:
Ultrasound in Medicine & Biology. 34:123-136
Acoustic output measurements of diagnostic ultrasound scanners are currently performed in water and derated to approximate in situ values. The derating scheme ignores nonlinear propagation of sound waves and has been shown in previous numerical and e
Autor:
Timothy A. Stiles, Christopher J. Murphy, Jan van den Broek, James A. Zagzebski, Christiane Görig, Tomy Varghese
Publikováno v:
American Journal of Veterinary Research. 67:288-295
Objective—To evaluate propagation velocity of acoustic waves through the lens and vitreous body of pigs, dogs, and rabbits and determine whether there were associations between acoustic wave speed and age, temperature, and time after enucleation. S
Autor:
Paul Lee, Gary R. Frank, Keith A. Wear, Ernest L. Madsen, Ernest J. Feleppa, Beom Soo Kim, William D. O'Brien, Jian R. Yuan, Balasundar Iyyavu Raju, Michael L. Oelze, Timothy A. Stiles, Francis Cheng, Christopher S. Hall, K. Kirk Shung, Thaddeus Wilson
Publikováno v:
Journal of Ultrasound in Medicine. 24:1235-1250
Objective As are the attenuation coefficient and sound speed, the backscatter coefficient is a fundamental ultrasonic property that has been used to characterize many tissues. Unfortunately, there is currently far less standardization for the ultraso
Publikováno v:
Journal of Ultrasound in Medicine. 24:501-516
Objective. Current determinations of diagnostic ultrasound exposure parameters (eg, peak rarefactional pressure and pulse intensity integral) are intended to correspond to propagation through soft tissue with a propagation speed of 1540 m/s and atten