Zobrazeno 1 - 10
of 41
pro vyhledávání: '"J. T. Vaughan"'
Publikováno v:
IEEE Transactions on Biomedical Engineering. 59:3365-3371
In high-field magnetic resonance imaging (MRI) systems, B0 fields of 7 and 9.4 T, the RF field shows greater inhomogeneity compared to clinical MRI systems with B0 fields of 1.5 and 3.0 T. In multichannel RF coils, the magnitude and phase of the inpu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::847638ae0ff6b9c20d3fd4a4ea57ea64
https://doi.org/10.1109/tbme.2012.2208965
https://doi.org/10.1109/tbme.2012.2208965
Autor:
J. T Vaughan, Greg Metzger, Kamil Ugurbil, Patrick J. Bolan, Jinfeng Tian, Carl Snyder, Steen Moeller, Pierre-Francois Van de Moortele, Can Akgun, Lance DelaBarre
Publikováno v:
Magnetic Resonance in Medicine. 67:954-964
Eight- and sixteen-channel transceive stripline/TEM body arrays were compared at 7 T (297 MHz) both in simulation and experiment. Despite previous demonstrations of similar arrays for use in body applications, a quantitative comparison of the two con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00ea0956db839d5c39267e518e0c0644
https://doi.org/10.1002/mrm.23070
https://doi.org/10.1002/mrm.23070
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 10:592-595
The combined field integral equation (CFIE) method is used to calculate the RF magnetic B1 field produced by a transmission-line resonator element for high-field magnetic resonance systems. The method calculates the surface currents on a homogeneous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86f6492c04786c1ad792d681645193ba
https://doi.org/10.1109/lawp.2011.2158286
https://doi.org/10.1109/lawp.2011.2158286
Autor:
Pierre-Francois Van de Moortele, Lance DelaBarre, Can Akgun, Carl Snyder, J. T Vaughan, Greg Metzger, Kamil Ugurbil
Publikováno v:
Magnetic Resonance in Medicine. 61:517-524
This work reports preliminary results from the first human cardiac imaging at 7 Tesla (T). Images were acquired using an eight-channel transmission line (TEM) array together with local B(1) shimming. The TEM array consisted of anterior and posterior
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f4f6980a22bf3235f53791f5dea70a5
https://doi.org/10.1002/mrm.21895
https://doi.org/10.1002/mrm.21895
Autor:
Lizann Bolinger, Carl Snyder, J. T Vaughan, T. Thiel, Gregor Adriany, Kamil Ugurbil, Jinfeng Tian, Lance DelaBarre, H. Liu
Publikováno v:
Magnetic Resonance in Medicine. 52:851-859
The use of body coils is favored for homogeneous excitation, and such coils are often paired with surface coils or arrays for sensitive reception in many MRI applications. While the body coil's physical size and resultant electrical length make this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8142c89ae3fd69bb5f707b96346e020b
https://doi.org/10.1002/mrm.20177
https://doi.org/10.1002/mrm.20177
Publikováno v:
Magnetic Resonance in Medicine. 45:46-52
This report describes the implementation and application of a multicompartment analysis of (31)P spectroscopic imaging data to determine the tissue-specific heterogeneities in metabolite content in the human brain and surrounding tissue. Using this i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a844f51e63c8503e65b6ee62bae8e30
https://doi.org/10.1002/1522-2594(200101)45:1<46::aid-mrm1008>3.0.co
https://doi.org/10.1002/1522-2594(200101)45:1<46::aid-mrm1008>3.0.co
Autor:
Gregor Adriany, Wanzhan Liu, J. T Vaughan, Christopher M. Collins, Lance DelaBarre, Michael B. Smith, Hellmut Merkle, Michael Garwood, Peter Andersen, Kamil Ugurbil, Rainer Goebel
Publikováno v:
Magnetic Resonance in Medicine. 46:24-30
Signal-to-noise ratio (SNR), RF field (B(1)), and RF power requirement for human head imaging were examined at 7T and 4T magnetic field strengths. The variation in B(1) magnitude was nearly twofold higher at 7T than at 4T ( approximately 42% compared
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0dea4e12c73f6bb8701ea579be18f14
https://doi.org/10.1002/mrm.1156
https://doi.org/10.1002/mrm.1156
Autor:
Dorothy Adams, Wen-Jang Chu, Hoby P. Hetherington, Graeme F. Mason, Donald B. Twieg, J. T Vaughan, Steven L. Ponder
Publikováno v:
Magnetic Resonance in Medicine. 39:346-353
31P NMR is commonly used to study brain energetics in health and disease. Due to sensitivity constraints, the NMR measurements are typically made in volumes that do not contain pure gray or white matter. For accurate evaluation of abnormalities in br
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fb3cbe92ed932b2c77705b28f0dd708
https://doi.org/10.1002/mrm.1910390303
https://doi.org/10.1002/mrm.1910390303
Publikováno v:
Magnetic Resonance in Medicine. 32:206-218
A tuned transmission line resonator has been developed in theory and in practical design for the clinical NMR volume coil application at 4.1 tesla. The distributed circuit transmission line resonator was designed for high frequency, large conductive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0d5d735fff64ad6508912b81f15d359
https://doi.org/10.1002/mrm.1910320209
https://doi.org/10.1002/mrm.1910320209
Autor:
Branch T. Archer, James L. Fleckenstein, B A Barker, J T Vaughan, Ronald M Peshock, Robert W. Parkey
Publikováno v:
Radiology. 179:499-504
To enhance the versatility of the short-tau inversion-recovery (STIR) sequences, the authors determined a range of repetition time (TR) and inversion time (TI) combinations that suppress signal intensity from fat by study of both patient and phantom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88e7fa7a3f7ec6168d978c2cdc8fe091
https://doi.org/10.1148/radiology.179.2.2014300
https://doi.org/10.1148/radiology.179.2.2014300