Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Ralph E. Baddour"'
Autor:
Michael Kolios, Michael D. Sherar, A. E. Worthington, A. Giles, G. J. Czarnota, Ralph E. Baddour, A. S. Tunis
It has previously been demonstrated in tissue-mimicking phantoms and in tissue that envelope statistics of US backscatter are affected by changes in the scatterer properties [1–4, 32, 37]. At higher frequencies the wavelength of the US begins to ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d82e09ae55baaa88dff02fd51f575d6d
https://doi.org/10.32920/ryerson.14636748
https://doi.org/10.32920/ryerson.14636748
Autor:
Michael D. Sherar, N.R. Farnoud, John W. Hunt, Linda R. Taggart, Ralph E. Baddour, Anoja Giles, Michael C. Kolios, G.J. Czarnota
Publikováno v:
Scopus-Elsevier
It has been previously shown that high frequency ultrasound (20 - 100 MHz) can be used to detect cellular structure changes in tissues and cell ensembles. Using spectral analysis methods to analyze radio-frequency data collected from in vitro and in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56c6dafbda2f261430eb9e8921218aff
https://doi.org/10.32920/ryerson.14639520.v1
https://doi.org/10.32920/ryerson.14639520.v1
The Fluid and Elastic Nature of Nucleated Cells: Implications from the Cellular Backscatter Response
Autor:
Michael C. Kolios, Ralph E. Baddour
In a previous experiment [Baddouret al., J. Acoust. Soc. Am.117(2), 934–943 (2005)] it was shown that it is possible to deduce the ultra-sound backscatter transfer function from single, subresolution cells in vitro, across a broad, continuous range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5fd1c8a5aa09a3cb558be8d474c7afb4
https://doi.org/10.32920/14641686
https://doi.org/10.32920/14641686
Assessing the proportion of biological cells in a volume of interest undergoing structural changes, such as cell death, using high-frequency ultrasound~20–100 MHz!, requires the development of a theoretical model of scattering by any arbitrary cell
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25bd8959ffb3b48f4dcfb9aceff6b72e
https://doi.org/10.32920/14638476
https://doi.org/10.32920/14638476
Publikováno v:
Ultrasound in Medicine & Biology. 33:389-401
High frequency ultrasound imaging (20 to 60 MHz) is increasingly being used in small animal imaging, molecular imaging and for the detection of structural changes during cell and tissue death. Ultrasonic tissue characterization techniques were used t
Publikováno v:
Journal of Biological Physics. 33:61-66
Ultrasound imaging is proving to be an important tool for medical diagnosis of dermatological disease. Backscatter spectral profiles using high-frequency ultrasound (HFUS, 10–100 MHz) are sensitive to subtle changes in eukaryotic cellular morpholog
Publikováno v:
The Journal of the Acoustical Society of America. 117:934-943
Assessing the proportion of biological cells in a volume of interest undergoing structural changes, such as cell death, using high-frequency ultrasound (20-100 MHz), requires the development of a theoretical model of scattering by any arbitrary cell
Publikováno v:
Behavior Research Methods, Instruments, & Computers. 34:383-390
We used a fully immersive virtual reality environment to study whether actively interacting with objects would effect subsequent recognition, when compared with passively observing the same objects. We found that when participants learned object stru
Autor:
Omar Falou, Charles Church, Ralph E. Baddour, George Nathanael, Gregory J. Czarnota, J. Carl Kumaradas, Michael C. Kolios
Publikováno v:
The Journal of the Acoustical Society of America. 124(5)
The high frequency backscatter from cells with a nucleus to cell volume ratio of 0.50 cannot be adequately modeled as a homogeneous sphere. It was hypothesized that the cytoplasm of such cells is of fluid nature. This work attempts to model the ultra
Autor:
Ralph E. Baddour, Michael C. Kolios
Publikováno v:
IEEE Ultrasonics Symposium, 2005..
Small variations in scatterer volume fraction, which can result from changes in tissue microstructure due to cancer therapies or organ preservation, may have a significant impact on ultrasound backscatter. Although the effect of volume fraction has b