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Efficient high‐frequency body coil for high‐field MRI
Author(s) -
Vaughan J.T.,
Adriany G.,
Snyder C.J.,
Tian J.,
Thiel T.,
Bolinger L.,
Liu H.,
DelaBarre L.,
Ugurbil K.
Publication year - 2004
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.20177
Subject(s) - electromagnetic coil , excitation , homogeneous , radiofrequency coil , acoustics , field (mathematics) , nuclear magnetic resonance , computer science , artifact (error) , body surface , materials science , biomedical engineering , physics , electrical engineering , engineering , artificial intelligence , mathematics , geometry , pure mathematics , thermodynamics
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 circuit difficult to design for any field strength, recent efforts to build efficient body coils for applications at 3T and above have been especially challenging. To meet this challenge, we developed an efficient new transverse electromagnetic (TEM) body coil and demonstrated its use in human studies at field strengths up to 4T. Head, body, and breast images were acquired within peak power constraints of <8 kW. Bench studies indicate that these body coils are feasible to 8T. RF shimming was used to remove a high‐field‐related cardiac imaging artifact in these preliminary studies. Magn Reson Med 52:851–859, 2004. © 2004 Wiley‐Liss, Inc.