Abstract #3287

GIRF Characterization of Three Preclinical High-Performance Gradient Systems at 9.4T

Oliver Goedicke¹, Alexander Jaffray², Andrew Yung³, Mark E. Ladd^1,4,5, Tristan A. Kuder^1,4, Alexander Rauscher^2,6, and Stefan A. Reinsberg²

¹Division of Medical Physics in Radiology, German Cancer Research Center (DKFZ) Heidelberg, Heidelberg, Germany, ²Department of Physics, University of British Columbia, Vancouver, BC, Canada, ³Department of Radiology, University of British Columbia, Vancouver, BC, Canada, ⁴Faculty of Physics and Astronomy, Heidelberg University, Heidelberg, Germany, ⁵Faculty of Medicine, Heidelberg University, Heidelberg, Germany, ⁶Department of Pediatrics, University of British Columbia, Vancouver, BC, Canada

Synopsis

Keywords: System Imperfections, Preclinical, GIRF, impulse response, GSTF, high-performance gradients, strong gradients

Motivation: The imperfections of pre-clinical high-performance gradient systems are largely unknown, especially at ultra-high field strength.

Goal(s): To gain an understanding of the gradient system response of such hardware at 9.4T.

Approach: We measure the gradient impulse response function (GIRF) of three high-performance gradient systems: two with identical specifications (660 mT/m), but mounted in different scanners, and one small-diameter insert, with a substantially higher maximum amplitude of 1450 mT/m.

Results: The GIRF of the small-diameter insert stands out distinctly when comparing all three systems. The two differently mounted, but otherwise identical systems only show subtle differences in their GIRFs.

Impact: We measure and compare the impulse response of different high-performance gradient systems at 9.4T. This marks the first step towards assessing and correcting for the imperfections and resulting artifacts of such hardware.

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