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Abstract #2458

Myocardial T1 mapping at 3T by sampling inversion recovery with real time turboflash

Yanjie Zhu 1 , Yinzhu Gao 1 , Qi Yang 2 , Min Pan 1 , Xin Liu 1 , and Yiu-Cho Chung 1

1 Paul C. Lauterbur Research Centre for Biomedical Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong, China, 2 Radiology Department, Xuanwu Hospital Capital Medical University, Beijing, China

Myocardial T1 mapping is useful in the diagnosis of myocardial fibrosis. The MOLLI method is sensitive to arrhythmia, tissue T2 values etc. and underestimates T1. We propose an arrhythmia insensitive myocardial T1 mapping technique, IR-rttfl. It performs realtime turboflash acquisition after an inversion pulse to sample the recovery of inverted magnetization for about 6 seconds. Diastolic images are selected retrospectively to estimate T1 map. In phantoms, IR-rttfl was more accurate than MOLLI. Results from IR-rttfl were comparable to MOLLI in healthy volunteers and a few infarct patients. The new technique is useful for robust myocardial T1 mapping at 3T.

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