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Abstract #4552

Roemer Reconstruction Yields Significant SNR Gain Over Sum-Of-Squares @ 7T.

Anna Andreychenko1, Sjoerd Crijns1, Ingmar Voogt1, Wouter Koning1, Peter Luijten1, Jan J. W. Lagendijk1, Cornelis A. T. van Den Berg1

1University Medical Center Utrecht, Utrecht, Netherlands

The SNR differences between optimal SNR, magnitude SNR and Sum-of-Squares (SoS) signal combination methods for an array of multiple receiver coil are generally thought to be modest. However, at high fields wave propagation effects arise which can significantly degrade SNR in the images reconstructed with the SoS. Here we have demonstrated both, theoretically and experimentally that optimal signal combination at high field (7T) is beneficial as it can considerably increase image SNR whereas at low field (1.5 T) there is no relevant SNR gain.