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Detunable transverse electromagnetic (TEM) volume coil for high‐field NMR
Author(s) -
Vaughan J.T.,
Adriany G.,
Garwood M.,
Yacoub E.,
Duong T.,
DelaBarre L.,
Andersen P.,
Ugurbil K.
Publication year - 2002
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.10141
Subject(s) - electromagnetic coil , excitation , nuclear magnetic resonance , radiofrequency coil , transverse plane , electromagnetic field , volume (thermodynamics) , field (mathematics) , physics , acoustics , homogeneous , signal (programming language) , materials science , optics , computer science , engineering , mathematics , structural engineering , quantum mechanics , pure mathematics , programming language , thermodynamics
Abstract Most high‐field MRI systems do not have the actively detuned body coils that are integral to clinical systems operating at 1.5T and lower field strengths. Therefore, many clinical applications requiring homogeneous volume excitation in combination with local surface coil reception are not easily implemented at high fields. To solve this problem for neuroimaging applications, actively detunable transverse electromagnetic (TEM) head coils were developed to be used with receive‐only surface coils for signal‐to‐noise ratio (SNR) gains and improved spatial coverage from homogeneously excited regions. These SNR and field of view (FOV) gains were achieved by application of a detunable TEM volume coil to human brain imaging at 4T. Magn Reson Med 47:990–1000, 2002. © 2002 Wiley‐Liss, Inc.