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Abstract #1745

A coil-noise-dominated flexible array inside a whole-head coil to improve temporal SNR in non-human primate imaging

Kyle M Gilbert1, Peter Zeman1, Jorn Diedrichsen2, Julio C Martinez-Trujilloc3, J Andrew Pruszynski3, and Ravi S Menon1

1Centre for Functional and Metabolic Mapping, The University of Western Ontario, London, ON, Canada, 2Department of Computer Science, The University of Western Ontario, London, ON, Canada, 3Department of Physiology and Pharmacology, The University of Western Ontario, London, ON, Canada

Typically, coil elements or arrays are dispersed on a two-dimensional surface to ensure their sensitivity profiles do not overlap, since correlated noise mitigates an SNR improvement when overlapping coils are operating in the sample-noise-dominated regime. In this study, we show that a small flexible array, operating in the coil-noise-dominated regime, can locally improve temporal SNR when placed inside a whole-head array. The two concentric arrays are inductively decoupled using preamplifier decoupling, and the contribution of coil noise to the overall noise reduces the noise correlation. Up to a two-fold increase in temporal SNR is achieved in the motor cortex.

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