Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Franz Hebrank"'
Autor:
Elfar Adalsteinsson, Franz Schmitt, Borjan Gagoski, Thomas Witzel, Lawrence L. Wald, Ulrich Fontius, Franz Hebrank, Andreas Potthast, Vijayanand Alagappan, Kawin Setsompop, Jonathan R. Polimeni
Publikováno v:
Magnetic Resonance in Medicine. 60:1422-1432
Slice-selective RF waveforms that mitigate severe B inhomogeneity at 7 Tesla using parallel excitation were designed and validated in a water phantom and human studies on six subjects using a 16-element degenerate stripline array coil driven with a b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33174f2bb182e71664f065e1fdf002f7
https://doi.org/10.1002/mrm.21739
https://doi.org/10.1002/mrm.21739
Autor:
Kawin Setsompop, Ulrich Fontius, Elfar Adalsteinsson, Adam C. Zelinski, Vijayanand Alagappan, Vivek K Goyal, Borjan Gagoski, Franz Hebrank, Franz Schmitt, Lawrence L. Wald
Publikováno v:
Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering. :176-190
Three algorithms for solving linearized systems of RF waveform design equations for calculating accelerated spatially-tailored excitations on parallel excitation MRI systems are presented. Their artifact levels, computational speed, and RF peak and r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce1ae8149704ad17e8b3103731b953e2
https://doi.org/10.1002/cmr.b.20093
https://doi.org/10.1002/cmr.b.20093
Publikováno v:
Der Radiologe. 38:750-758
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::287a2587b591803402e7e888547e697b
https://doi.org/10.1007/s001170050420
https://doi.org/10.1007/s001170050420
Autor:
Elfar Adalsteinsson, Franz Hebrank, Lawrence L. Wald, Vijayanand Alagappan, Franz Schmitt, Borjan Gagoski, Ulrich Fontius, Andreas Potthast, Kawin Setsompop
Publikováno v:
Magnetic resonance in medicine. 61(2)
Chemical shift imaging benefits from signal-to-noise ratio (SNR) and chemical shift dispersion increases at stronger main field such as 7 Tesla, but the associated shorter radiofrequency (RF) wavelengths encountered require B1+ mitigation over both t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8e6aa55ffade7c4729dad55646b689e
https://pubmed.ncbi.nlm.nih.gov/19161170
https://pubmed.ncbi.nlm.nih.gov/19161170
Autor:
Werner Irnich, Franz Hebrank
Publikováno v:
Journal of magnetic resonance imaging : JMRI. 29(1)
Purpose To clarify whether sinusoidal pulses possess lower thresholds than rectangular ones at perception threshold, a statement often made that contradicts the theory of stimulation. Materials and Methods The results of a nerve stimulation study wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d22eeaa94045cbeaf7919047ac2a346
https://pubmed.ncbi.nlm.nih.gov/19097100
https://pubmed.ncbi.nlm.nih.gov/19097100
Autor:
Franz Hebrank, Vijayanand Alagappan, Franz Schmitt, Elfar Adalsteinsson, Ulrich Fontius, Lawrence L. Wald, Andreas Potthast, Adam C. Zelinski, Kawin Setsompop
Publikováno v:
Journal of magnetic resonance (San Diego, Calif. : 1997). 195(1)
At high magnetic field, B(1)(+) non-uniformity causes undesired inhomogeneity in SNR and image contrast. Parallel RF transmission using tailored 3D k-space trajectory design has been shown to correct for this problem and produce highly uniform in-pla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29ad3b5c27f171403c7aceb7a5bb2d08
https://pubmed.ncbi.nlm.nih.gov/18799336
https://pubmed.ncbi.nlm.nih.gov/18799336
Autor:
Markus Vester, Franz Schmitt, Juergen Nistler, Wolfgang Renz, Adam C. Zelinski, Franz Hebrank, Ulrich Fontius, Graham Wiggins, Lawrence L. Wald, Kawin Setsompop, Vijayanand Alagappan, Elfar Adalsteinsson
Publikováno v:
Magnetic resonance in medicine. 57(6)
An eight-rung, 3T degenerate birdcage coil (DBC) was constructed and evaluated for accelerated parallel excitation of the head with eight independent excitation channels. Two mode configurations were tested. In the first, each of the eight loops form
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1153e9774f4d4e3c3fd016d0942711c
https://pubmed.ncbi.nlm.nih.gov/17534905
https://pubmed.ncbi.nlm.nih.gov/17534905
Autor:
Franz Hebrank, Borjan Gagoski, Franz Schmitt, Vijayanand Alagappan, Ulrich Fontius, Lawrence L. Wald, Kawin Setsompop, Elfar Adalsteinsson
Publikováno v:
Magnetic resonance in medicine. 56(5)
Spatially selective RF waveforms were designed and demonstrated for parallel excitation with a dedicated eight-coil transmit array on a modified 3T human MRI scanner. Measured excitation profiles of individual coils in the array were used in a low-fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c874e9c9d4a304c089cacf7dd47fbd4
https://pubmed.ncbi.nlm.nih.gov/17036289
https://pubmed.ncbi.nlm.nih.gov/17036289
Autor:
Daniel J. Schaefer, Georg Frese, Joe D. Bourland, Jacques A. Den Boer, Cornelis Leonardus Gerardus Ham, Johan M.L. Engels, John A. Nyenhuis, Franz Hebrank
Publikováno v:
Journal of magnetic resonance imaging : JMRI. 15(5)
Purpose: To compare thresholds for peripheral nerve stimulation from gradient switching in whole body magnetic resonance (MR) equipment of different design. Materials and Methods: Threshold data obtained in three experiments were reformatted into a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39ba3f9ac1bbf241872ad1887fe9f779
https://pubmed.ncbi.nlm.nih.gov/11997892
https://pubmed.ncbi.nlm.nih.gov/11997892