Sayim Gokyar1, Henning U. Voss1, Victor Taracila2, Fraser J. L. Robb2, Michael Bernico3, Douglas Kelley3, Douglas J. Ballon1, and Simone Angela Winkler1
1Radiology, Weill Cornell Medicine, New York, NY, United States, 2General Electric Healthcare, Aurora, OH, United States, 3General Electric Healthcare Technologies, Waukesha, WI, United States
1Radiology, Weill Cornell Medicine, New York, NY, United States, 2General Electric Healthcare, Aurora, OH, United States, 3General Electric Healthcare Technologies, Waukesha, WI, United States
We
demonstrate feasibility of the 2D c-HPL concept at 7T. Simulation results show
25% reduced SAR and 45% increased B1+ homogeneity as compared to the birdcage
concept. First in vitro images in quadrature mode demonstrate functional
operation and agree with simulations.
Figure 2. A selection of mode distributions of the proposed 4 × 8 c-HPL
coil, where each mode occurs at a different frequency due to mutual coupling. Here, mode (1,4) occurs at the lowest frequency with a higher spatial variation among others. Mode (1,1) is tuned to 298 MHz and showed the best B1+ uniformity.
Figure 1. (a) A 16-leg high-pass birdcage coil, (b) a 2D cylindrical high-pass ladder
(2D c-HPL) coil array (4 × 8). Both coils are loaded with a spherical phantom at isocenter and driven with an accepted RF power of 1W.
