Abstract #3102

Cine T1 Mapping: Look-Locker inversion recovery for phase resolved T1-Mapping with B1+ Correction At 3T

Sebastian Weingärtner^1,2,3, Chetan Shenoy⁴, Lothar R. Schad³, and Mehmet Akçakaya^1,2

¹Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, United States, ²Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, ³Computer Assisted Clinical Medicine, Heidelberg University, Mannheim, Germany, ⁴Department of Cardiology, University of Minnesota, Minneapolis, MN, United States

Conventionally, evaluation of myocardial T₁-times is limited to a single snapshot of the cardiac cycle, leaving much of the dependence between functional and tissue characterization unstudied. Here, we propose an ECG-triggered steady-state Look-Locker technique that allows for functional, cardiac phase-resolved native T₁-mapping. Integratedly acquired phase-resolved B₁⁺-maps are used for T₁-time correction. High accuracy and good consistency of the T₁-times across cardiac phases is shown in phantom scans. In-vivo T₁-times show slight underestimation and similar precision compared to saturation-recovery T₁-mapping. High visual image quality at all cardiac phases is obtained at temporal resolutions up to 40ms in a single breath-hold.

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