Zobrazeno 1 - 10
of 21
pro vyhledávání: '"T. K. Kidane"'
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
Autor:
Yu Chung N Cheng, T. P. Eagan, Thomas Chmielewski, Robert W. Brown, J. Flock, H. Mathur, Sh.M. Shvartsman, T. K. Kidane
Publikováno v:
Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering. :42-52
A method for finding closed-form solutions corresponding to the normal modes of Kirchhoff systems with a modicum of symmetry has been investigated. This method can be particularly useful for the questions of degeneracy that arise when considering par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29adb28b1674e2120e1feb1faa334271
https://doi.org/10.1002/cmr.b.20027
https://doi.org/10.1002/cmr.b.20027
Autor:
Robert W. Brown, T. K. Kidane, William A. Edelstein, Tanvir Baig, V. Taracila, T. P. Eagan, John A. Mallick, Yu Chung N Cheng
Publikováno v:
Magnetic Resonance in Medicine. 53:1013-1017
An important source of MRI acoustic noise-magnet cryostat warm-bore vibrations caused by eddy-current-induced forces-can be mitigated by a passive metal shield mounted on the outside of a vibration-isolated, vacuum-enclosed shielded gradient set. Fin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb18efbbd53727d2d6cbbaee2c7fcead
https://doi.org/10.1002/mrm.20472
https://doi.org/10.1002/mrm.20472
Autor:
R W, Brown, Y-C N, Cheng, T P, Eagan, T K, Kidane, H, Mathur, R G, Petschek, W G, Sherwin, S M, Shvartsman, J D, Willig
Publikováno v:
Magma: Magnetic Resonance Materials in Physics, Biology, and Medicine. 13:186-192
A new method is described for reducing the shielding-error function in the 'supershielding' approach to designing MRI systems. The method is thus shown to lead to significantly better shielding and better control of eddy current effects associated wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05aa6826b354061fb3b9ba75e44c4b91
https://doi.org/10.1007/bf02678595
https://doi.org/10.1007/bf02678595
Autor:
Sh.M. Shvartsman, T. K. Kidane, Robert W. Brown, J. Flock, M. C. Kang, T. P. Eagan, Thomas Chmielewski, Yu Chung N Cheng
Publikováno v:
Magma (New York, N.Y.). 16(3)
A method for finding closed-form solutions for the normal mode frequencies of systems with circulant \( \left( {{{2\pi } \over n}} \right) \) symmetry was investigated. This method is particularly useful for questions of degeneracy that arise when on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::303d22cd0ae980b0d432ed06b339639c
https://pubmed.ncbi.nlm.nih.gov/14694884
https://pubmed.ncbi.nlm.nih.gov/14694884
Autor:
Y.-C. N. Cheng, T. P. Eagan, T. Chmielewski, J. Flock, M.-C. Kang, T. K. Kidane, Sh. M. Shvartsman, R. W. Brown
Publikováno v:
MAGMA: Magnetic Resonance Materials in Physics, Biology & Medicine; Number 2, Vol. 16 Issue 2, p103-111, 55p
Autor:
William A. Edelstein, Timothy Eagan, Robert W. Brown, Tanvir Baig, T. K. Kidane, Victor Taracilla
Publikováno v:
The Journal of the Acoustical Society of America. 126:935
The present invention provides an apparatus for reducing acoustic noise in a magnetic resonance imaging device including passive shielding located outside the actively shielded gradient winding elements in order to reduce the magnitude of fields that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67df3cb38d0e4a6c330338481af40186
https://doi.org/10.1121/1.3204355
https://doi.org/10.1121/1.3204355
Publikováno v:
Magnetic Resonance Letter; Feb2024, Vol. 4 Issue 1, p1-9, 9p
Publikováno v:
Review of Scientific Instruments; Sep2018, Vol. 89 Issue 9, pN.PAG-N.PAG, 8p, 2 Diagrams, 3 Charts, 6 Graphs