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Rat brain MRI at 16.4T using a capacitively tunable patch antenna in combination with a receive array
Author(s) -
Shajan G.,
Hoffmann Jens,
Balla Dávid Z.,
Deelchand Dinesh K.,
Scheffler Klaus,
Pohmann Rolf
Publication year - 2012
Publication title -
nmr in biomedicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.278
H-Index - 114
eISSN - 1099-1492
pISSN - 0952-3480
DOI - 10.1002/nbm.2786
Subject(s) - electromagnetic coil , acoustics , radiofrequency coil , nuclear magnetic resonance , physics , homogeneous , excitation , radio frequency , computer science , materials science , optics , telecommunications , quantum mechanics , thermodynamics
Electromagnetic wave propagation, essential for far‐field excitation in the conventional taveling wave technique, is not supported in MR scanners with narrow bores due to their high cutoff frequency. By moving the transmit antenna closer to the sample and using the near‐field for excitation, it is still possible to produce a relatively homogenous as well as efficient B 1 + field over a large volume. In this article, we present the first application of near‐field excitation using a capacitively tunable patch antenna in combination with a receive coil array for small animal imaging at 16.4T.