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Abstract #2908

Silent EPSI using a gradient axis driven at 20 kHz

Edwin Versteeg1, Kyungmin Nam1, Dennis Klomp1, Jeroen Hendrikse1, Alex Bhogal1, Jeroen Siero1,2, and Jannie Wijnen1
1Radiology, University Medical Center Utrecht, Utrecht, Netherlands, 2Spinoza Centre for Neuroimaging Amsterdam, Amsterdam, Netherlands

Echo planar spectroscopic imaging (EPSI) can be used for fast spectroscopic imaging, however, the gradient hardware greatly limits the spectral bandwidth. Moreover, the associated fast switching gradient produces uncomfortable levels of acoustic noise. In this work, we show the feasibility of spectroscopic imaging at high spectral bandwidth using a silent gradient axis driven at 20 kHz and a segmented EPSI sequence. We report results on the silent segmented EPSI compared to the conventional EPSI approach on a phantom containing NAA, creatine and glutamate and show the first silent and high bandwidth in-vivo measurements.

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