Abstract #1342
Approaching Ultimate SNR: Comparison of Composite and Surface Coil Arrays
Adam Maunder 1 , Mojgan Daneshmand 1 , Pedram Mousavi 1 , B. Gino Fallone 2 , and Nicola De Zanche 2
1
Electrical and Computer Engineering,
University of Alberta, Edmonton, Alberta, Canada,
2
Oncology,
University of Alberta, Edmonton, Alberta, Canada
It has been shown that at high MRI frequencies current
patterns other than those provided by surface coils are
required to approach the ultimate SNR. SNR improvements
in realistic arrays become limited due to noise from
coils and matching networks in large arrays. Arrays of
three orthogonal coils are naturally decoupled, provide
complementary sensitivities and allow the use of larger,
body loss dominated, coils. Simulations of large 18-,
36- and 54-element arrays composed of composite and
surface coils are compared in terms of SNR and parallel
imaging performance. Noise contributions from the coil,
matching networks and preamplifiers are included for a
realistic comparison.
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