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Abstract #2623

A Twisted Loop Coil for High Field MRI

Wolfgang Loew1, Randy Giaquinto1, Scott Dunn1, Ronald Pratt1, Diana Lindquist1, Charles Dumoulin1

1Imaging Research Center, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States

A novel RF coil design for a 7T animal scanner was developed. The new approach uses a loop coil twisted around a cylindrical former. The RF homogeneity of this new design was compared to an identically-sized birdcage using B1 mapping, and found to be more uniform. SNR comparisons between the coils showed the expected sensitivity ratio between a linear and quadrature coil. The RF homogeneity and SNR characteristics of the new coil were evaluated in in-vivo mouse images acquired with the twisted loop design. The new coil has fewer parts and is easier to tune than a comparably-sized birdcage coil.