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Abstract #2720

Accurate Myocardial T1-Mapping in Arrhythmia using Saturation-Recovery during Systole at 3T

Nadja M Meßner1,2, Sebastian Weingärtner1,3,4, Johannes Budjan5, Dirk Loßnitzer6, Theano Papavassiliu2,6, Lothar R Schad1, and Frank G Zöllner1

1Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany, 2DZHK (German Centre for Cardiovascular Research), partner site Mannheim, Mannheim, Germany, 3Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, United States, 4Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States, 5Institute of Clinical Radiology and Nuclear Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany, 61st Department of Medicine Cardiology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany

In arrhythmic patients, ECG mis-triggering frequently leads to T1-quantification inaccuracy.

In this study, a heart-rate independent saturation-recovery T1-mapping method was adapted for systolic imaging at 3T by performing magnetization saturation right after the systolic imaging window and prior to R-wave detection. Estimated T1- and ECV- values during systole were (1557±53ms/ 0.21±0.03) compared to (1585±58ms/0.21±0.03) at diastole.

Our results show that SR T1-mapping might be an advantageous alternative to yield accurate T1- and ECV-values in patients with arrhythmia or reduced myocardial wall-thickness.

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