Zobrazeno 1 - 10
of 26
pro vyhledávání: '"B.M. Shapo"'
Autor:
J.R. Crowe, Ching-Chen Wu, Douglas N. Stephens, J.A. Kovach, Matthew O'Donnell, D. Bleam, Michael J. Eberle, E. Ignacio Cespedes, David W.M. Muller, Robert J. Lederman, B.M. Shapo
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 47:672-681
In applications in which Doppler processing is not possible, such as side-looking intravascular imaging systems, decorrelation methods can be used to estimate blood speed. Here, a method is presented measuring relative blood speed using an FIR filter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0d58ab47111c35773eb8bf3f8546aba
https://doi.org/10.1109/58.842055
https://doi.org/10.1109/58.842055
Autor:
K. San Vicente, Douglas N. Stephens, Michael J. Eberle, J.L. Litzza, B.M. Shapo, Matthew O'Donnell
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 44:714-721
A 64-element, high efficiency, ceramic piezoelectric array transducer operating at 20 MHz has been constructed for ultrasonic intraluminal imaging. The array is mounted on the surface of a 1.2 mm diameter catheter appropriate for coronary artery appl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e07f9daaae3b3202eba0420bef47ce91
https://doi.org/10.1109/58.658335
https://doi.org/10.1109/58.658335
Publikováno v:
Ultrasonic Imaging. 18:173-191
In coronary arteries, knowing the relative stiffness of atherosclerotic lesions can help physicians select the most appropriate therapeutic modality. Because soft material supports larger strains than hard, measurements of this quantity can distingui
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::858e3fa1c5b98cfb033f114f5dd0b6b5
https://doi.org/10.1177/016173469601800302
https://doi.org/10.1177/016173469601800302
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 43:234-246
Tissue elasticity can be estimated from displacement and strain images acquired under controlled deformation. We extend this approach for coronary arteries, deformed and imaged by an integrated angioplasty balloon and ultrasonic imaging probe. Becaus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8a94d2eb1e193abfe13ca05c5cfdbcb
https://doi.org/10.1109/58.485949
https://doi.org/10.1109/58.485949
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 41:314-325
Previous ultrasound speckle tracking methods have been extended, permitting measurement of internal displacement and strain fields over a wide dynamic range of tissue motion. The markedly increased dynamic range of this approach should lead to enhanc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7048b894e7604e599f0be875ea488dc
https://doi.org/10.1109/58.285465
https://doi.org/10.1109/58.285465
Publikováno v:
IEEE 1992 Ultrasonics Symposium Proceedings.
Quantitative strain images of tissue equivalent phantoms have been obtained for a number of conditions using Fourier-based speckle tracking methods. Experimental results demonstrate that a non-palpable inclusion with Young's modulus only 3 times grea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5fd04c9068c05eaa829c5cd5ef9ce36
https://doi.org/10.1109/ultsym.1992.276013
https://doi.org/10.1109/ultsym.1992.276013
Autor:
Ching-Chen Wu, J.R. Crowe, Robert J. Lederman, J.A. Kovatch, Douglas N. Stephens, Michael J. Eberle, B.M. Shapo, D. Bleam, David W.M. Muller, Matthew O'Donnell
Publikováno v:
1996 IEEE Ultrasonics Symposium. Proceedings.
The rate of blood speckle decorrelation for scatterers moving through the imaging plane of an intravascular system can be used to estimate flow velocity. The authors have tested this hypothesis with an intraluminal array imaging system appropriate fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::422d43e5bd0b06f84fd373ba5faa544f
https://doi.org/10.1109/ultsym.1996.584349
https://doi.org/10.1109/ultsym.1996.584349
Publikováno v:
1996 IEEE Ultrasonics Symposium. Proceedings.
In coronary arteries, knowing the relative stiffness of atherosclerotic lesions can help physicians select the most appropriate therapeutic modality. Because soft material supports larger strains than hard, measurements of this quantity can distingui
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5299a190cbaabe69df7a1108c387d8da
https://doi.org/10.1109/ultsym.1996.584200
https://doi.org/10.1109/ultsym.1996.584200
Publikováno v:
IEEE 1991 Ultrasonics Symposium.
High resolution images are used to track the motion of small arteries under application of a static radial pressure. A Fourier-based method for tracking both radial and azimuthal motion over a wide dynamic range is presented. Simulation results descr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9386b58bb3a3e15d5104adbd55eca679
https://doi.org/10.1109/ultsym.1991.234286
https://doi.org/10.1109/ultsym.1991.234286
Autor:
Ching-Chen Wu, J.J. Chen, D.M.W. Muller, Douglas N. Stephens, J.R. Crowe, K. San Vincente, J.L. Litzza, R.L. Lederman, J.A. Kovach, Michael J. Eberle, D. Bleam, Matthew O'Donnell, B.M. Shapo, R.C. Ziegenbein, C.D. Choi
Publikováno v:
1997 IEEE Ultrasonics Symposium Proceedings. An International Symposium (Cat. No.97CH36118).
There are two primary reasons why intravascular ultrasound has not yet reached its potential for interventional cardiology. First, image quality has been poor given the possible operating frequencies and numerical apertures. And second, there is no a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae4b8c8dc8b5641ca7435d7f19c40fe9
https://doi.org/10.1109/ultsym.1997.661850
https://doi.org/10.1109/ultsym.1997.661850