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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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