Zobrazeno 1 - 10
of 100
pro vyhledávání: '"William A. Edelstein"'
Autor:
William A. Edelstein, Laura M. Fayad, Abdel Monem M. El-Sharkawy, Daniel J. Durand, Thierry A.G.M. Huisman, John A. Carrino
Publikováno v:
Journal of Magnetic Resonance Imaging. 37:1402-1408
Purpose: To determine the minimal image quality needed to preserve diagnostic performance relative to arthroscopy in the knee. Materials and Methods: Synthetic noise was added to images from clinical MRI scans (three-dimensional SPACE pulse sequence;
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a4cad4d53d24980f574bd2fc7944b41
https://doi.org/10.1002/jmri.23922
https://doi.org/10.1002/jmri.23922
Publikováno v:
Medical Physics. 39:2334-2341
Purpose: Accurate measurements of the RF power delivered during clinical MRI are essential for safety and regulatory compliance, avoiding inappropriate restrictions on clinical MRI sequences, and for testing the MRI safety of peripheral and intervent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::227cffd5c7521346d6bfdbfc7d1d521b
https://doi.org/10.1118/1.3700169
https://doi.org/10.1118/1.3700169
Publikováno v:
Journal of Magnetic Resonance Imaging. 36:743-747
Purpose: To assess possible damage to the hearing of experimental and companion animal subjects of magnetic resonance imaging (MRI) scans. Materials and Methods: Using animal hearing threshold data and sound level measurements from typical MRI pulse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e2fb9d84b5531428fe08c3fdcd28410
https://doi.org/10.1002/jmri.23653
https://doi.org/10.1002/jmri.23653
Publikováno v:
Natural Science. :749-754
Highly relativistic speeds are desirable for interstellar travel. Relativistic time dilation would reduce the subjective duration of the trip for the travelers, so that they can cover galaxy-scale distances in a reasonable amount of personal time. Un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a68182c9138814ddf6c758a2aee9ecdc
https://doi.org/10.4236/ns.2012.410099
https://doi.org/10.4236/ns.2012.410099
Publikováno v:
Journal of Magnetic Resonance. 214:273-280
During adiabatic excitation, the nuclear magnetization in the transverse plane is subject to T(2) (spin-spin) relaxation, depending on the pulse length τ. Here, this property is exploited in a method of measuring T(2) using the ratio of NMR signals
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f513c6fe172b594bf6bb5c975d77a72
https://doi.org/10.1016/j.jmr.2011.11.016
https://doi.org/10.1016/j.jmr.2011.11.016
Publikováno v:
Medical Physics. 37:3828-3843
Purpose The presence of implanted electronic devices with conducting leads and electrodes are contraindicated for magnetic resonance imaging (MRI), denying many patients its potential benefits. The prime concern is MRI's radio frequency (RF) fields,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53f56a6462b7c3508277351dd487af13
https://doi.org/10.1118/1.3439590
https://doi.org/10.1118/1.3439590
Autor:
Refaat E. Gabr, Arthur D. Edelstein, Paul A. Bottomley, Dara L. Kraitchman, Michael Schär, William A. Edelstein
Publikováno v:
Journal of Magnetic Resonance. 198:137-145
As the number of MRI phased array coil elements grows, interactions among cables connecting them to the system receiver become increasingly problematic. Fiber optic or wireless links would reduce electromagnetic interference, but their dynamic range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ea4dcb2a07530d1fd961b1fb711ef5b
https://doi.org/10.1016/j.jmr.2009.01.037
https://doi.org/10.1016/j.jmr.2009.01.037
Publikováno v:
Magnetic Resonance in Medicine. 61:1201-1209
Circular loops are the most common MR detectors. Loop arrays offer improved signal-to-noise ratios (SNRs) and spatial resolution, and enable parallel imaging. As loop size decreases, loop noise increases relative to sample noise, ultimately dominatin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9a0d00ebebbc652850ce408a46a2611
https://doi.org/10.1002/mrm.21948
https://doi.org/10.1002/mrm.21948
Autor:
Tanvir Baig, T. P. Eagan, Robert W. Brown, Labros S. Petropoulos, T. K. Kidane, William A. Edelstein
Publikováno v:
Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering. :12-23
Shielded gradient coil assemblies produce eddy currents in surrounding metal structures. Such eddy currents can degrade image quality and produce acoustic noise. These effects are magnified for high-field MRI scanners because of increased Lorentz for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e72cec5a7018a0d7a96365495e6710aa
https://doi.org/10.1002/cmr.b.20079
https://doi.org/10.1002/cmr.b.20079
Autor:
Robert W. Brown, T. K. Kidane, Tanvir Baig, Yu Chung N Cheng, William A. Edelstein, V. Taracila, T. P. Eagan
Publikováno v:
IEEE Transactions on Magnetics. 42:3854-3860
We have modeled the effect of passive copper shielding applied to the outside of an actively shielded, axisymmetric z-gradient coil assembly, with the aim of substantially reducing induced eddy currents in the cryostat inner bore that create acoustic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c758c953e1ce71a2d1b9779838549b8
https://doi.org/10.1109/tmag.2006.884514
https://doi.org/10.1109/tmag.2006.884514