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Abstract #3166

Potential gain of a 256 channel head coil at 7T: combined measurements and g-factor calculations

Arjan D. Hendriks 1 , Michel G.M. Italiaander 2 , Natalia Petridou 1 , and Dennis W.J. Klomp 1,2

1 Department of Radiology, University Medical Center Utrecht, Utrecht, Netherlands, 2 MR Coils B.V., Drunen, Netherlands

Recent developments in high-density surface receiver arrays, together with high BOLD sensitivity at 7T, allow human fMRI at ~0.5mm isotropic resolution and a volume acquisition time in the order of few seconds. However, with element sizes of 1x2cm and 32-channels, these benefits are limited to a small field of view. In this study, the expected g-factor gain of a 256-channel surface coil is estimated by combining 8 measurements of a high-density 32 channel surface coil. Results show that benefits achieved with 32-channels can extend to 256-channels. Full head coverage and decreased g-factors (gain in SNR or acceleration) can be achieved.

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