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Abstract #0350

Prospective motion correction for 2D T1-Mapping in the liver using an ultra-wideband radar system

Tom Neumann1, Juliane Ludwig1, Kirsten M. Kerkering1, Peter Speier2, Frank Seifert1, and Christoph Kolbitsch1
1Physikalisch-Technische Bundesanstalt, Braunschweig and Berlin, Germany, 2Siemens Healthcare, Erlangen, Germany


We present a radar-based approach for prospective motion correction for 2D T1 mapping of the abdomen. An ultra-wideband radar signal is acquired simultaneously but otherwise completely independent of the MR measurement. This allows us to correct for in-plane as well as through-plane motion during MR acquisition. This is especially important for 2D T1 mapping, where motion can cause not only blurring and streaking artifacts, but also inaccurate values when unexcited volumes move through the recorded image plane. It is demonstrated that the method strongly improves T1 maps in phantom and in-vivo scans.

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