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Myocardial T1 values in healthy volunteers measured with saturation method using adaptive recovery times for T1 mapping (SMART1Map) at 1.5 T and 3 T

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Abstract

Myocardial T1 mapping is clinically valuable for assessing the myocardium, and modified look-locker inversion-recovery (MOLLI) approaches have been commonly used for measuring myocardial T1 values. To date, several other sequences have been developed for measuring myocardial T1 values, and saturation-recovery-based sequences have been shown to be less dependent on various factors, such as T2 times and magnetization transfer, than inversion-recovery techniques. Systematic differences in T1 values between different sequences have been reported; therefore, definition of the normal range of native T1 values is required before clinical usage can begin. The purpose of this study was to evaluate the reference range and sex dependency of native T1 values in the myocardium measured using one such saturation-recovery sequence, i.e., saturation method using adaptive recovery times for cardiac T1 mapping (SMART1Map). Myocardial T1 values were compared between SMART1Map and MOLLI in 24 young healthy volunteers at 1.5 T and 3 T, and differences in the T1 values between the sexes were assessed. The mean native T1 values in the myocardium were significantly longer with SMART1Map than MOLLI [1530.4 ± 49.2 vs 1222.1 ± 48.9 ms at 3 T (p < 0.001) and 1227.3 ± 41.9 ms vs 1014.8 ± 49.4 ms at 1.5 T (p < 0.001)]. A significant difference between the sexes was observed in the T1 values obtained using each sequence, excluding SMART1Map at 3 T. The SMART1Map has a potential advantage to overcome the shortcoming of MOLLI, which underestimates T1 values; however, the sex-dependent difference remains obscure using SMART1Map.

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Acknowledgements

We would like to thank Dr. Glenn S Slavin for developing and providing the SMART1Map sequence. This study was funded by GE Healthcare (11781177532).

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Authors and Affiliations

  1. Department of Radiology, Keio University School of Medicine, 35 Shinanomachi, Shinjyuku-ku, Tokyo, 160-8582, Japan

    Shunsuke Matsumoto, Shigeo Okuda, Yoshitake Yamada, Tatsuya Suzuki, Akihiro Tanimoto & Masahiro Jinzaki

  2. MR Applications and Workflow, GE Healthcare Japan, 4-7-127, Asahigaoka, Hino-shi, Tokyo, Japan

    Atsushi Nozaki

Authors
  1. Shunsuke Matsumoto
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  2. Shigeo Okuda
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  3. Yoshitake Yamada
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  4. Tatsuya Suzuki
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  5. Akihiro Tanimoto
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  6. Atsushi Nozaki
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  7. Masahiro Jinzaki
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Correspondence to Shigeo Okuda.

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Conflict of interest

GE Healthcare provided a grant for conducting the volunteer study. One author (AN) is an employee of GEHC Japan. His role in this study was limited to preparing the sequence. The funder had no role in the study design, data collection, data analysis, decision to publish, or preparation of the manuscript.

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Matsumoto, S., Okuda, S., Yamada, Y. et al. Myocardial T1 values in healthy volunteers measured with saturation method using adaptive recovery times for T1 mapping (SMART1Map) at 1.5 T and 3 T. Heart Vessels 34, 1889–1894 (2019). https://doi.org/10.1007/s00380-019-01401-5

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