Abstract #0316
Array RF Transmitter for 7T MRI of the Spine Based on Dipole Antennas
Qi Duan 1 , Natalia Gudino 1 , Jacco A. de Zwart 1 , Peter van Gelderen 1 , Joe Murphy-Boesch 1 , Jeff H. Duyn 1 , and Hellmut Merkle 1
1
LFMI, National Institute of Neurological
Disorders and Stroke, National Institutes of Health,
Bethesda, Maryland, United States
The feasibility of using electric dipole antennas for RF
transmission for 7T spine MRI is explored. A transmitter
consisting of two electric dipole antennas parallel to B
0
is
evaluated. The capability of B
1
+
field
steering was demonstrated on a phantom. The transmit
efficiency for the optimal setup was compared to a
previously published design for a 7T spine array. The
proposed transmit structure allows easy integration with
a receive-only phased array. Because of design
simplicity and favorable B
1
+
efficiency,
dipole antennas provide a promising alternative to
conventional design for spine MRI at high field.
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