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Abstract #2629

TR effect on Myelin Water Imaging

Jing Zhang1, Suchandrima Banerjee2, and Alexander L. MacKay3
1Global MR Applications & Workflow, GE Healthcare, Vancouver, BC, Canada, 2Global MR Applications & Workflow, GE Healthcare, Menlo Park, CA, United States, 3Department of Radiology, University of British Columbia, Vancouver, BC, Canada

Synopsis

Keywords: White Matter, White Matter, myelin water imaging

Myelin water fraction (MWF) is conventionally measured using the T2 decay curve. For a spin-echo based sequence, the repetition time (TR) is limited by SAR. Most MWF studies have been carried out at 3T; but a 1.5T system has lower power deposition, which enables MWF imaging at lower TRs. Shorter TR will also reduce the total scan time. In this work, we performed myelin water imaging on a 1.5T system to investigate the effect of shorter TR on this technique. This work demonstrated increased MWF in human brain in vivo with decreasing TR.

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Keywords