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Abstract #2643

Comparison of MOLLI and AIR cardiac T1 mapping pulse sequences in a clinical population of cardiomyopathies

Sean Robison 1 , Daniel Kim 2 , Kyungpyo Hong 2 , Emma Hornsey 1 , Piyush Srivastava 3,4 , Gerard Smith 1 , Leighton Kearney 3 , and Ruth P Lim 1,4

1 Department of Radiology, Austin Health, Melbourne, Victoria, Australia, 2 UCAIR, Department of Radiology, University of Utah, Salt Lake City, Utah, United States, 3 Department of Cardiology, Austin Health, Melbourne, Victoria, Australia, 4 The University of Melbourne, Melbourne, Victoria, Australia

We compare the performance of two cardiac T1 mapping pulse sequences, Modified Look-Locker inversion recovery (MOLLI) and arrhythmia insensitive rapid (AIR), in patients with cardiomyopathies. In ten patients referred for varying indications, we found significantly different cardiac T1 and partition coefficient values between MOLLI and AIR. These findings are consistent with previous studies which reported that different cardiac T1 mapping pulse sequences yield significantly different T1 and extracellular volume fraction measurements in normal hearts. Awareness of these differences is important for clinical application and interpretation.

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