Scientific article
English

Simultaneous T1, T2 and T2⁎ mapping of the liver with multi-shot MI-SAGE

Published inMagnetic resonance imaging, vol. 105, p. 75-81
Publication date2024-01
First online date2023-11-07
Abstract

Purpose: To apply multi-shot high-resolution multi inversion spin and gradient echo (MI-SAGE) acquisition for simultaneous liver T1 , T2 and T2 * mapping.

Methods: Inversion prepared spin- and gradient-echo EPI was developed with ascending slice order across measurements for efficient acquisition with T1 , T2 , and T2 weighting. Multi-shot EPI was also implemented to minimize distortion and blurring while enabling high in-plane resolution. A dictionary-matching approach was used to fit the images to quantitative parameter maps, which were compared to T1 measured by modified Look-Locker (MOLLI), T1 measured by variable flip angle (VFA), T2 measured by multiple echo time-based Half Fourier Single-shot Turbo spin-Echo (HASTE), T2 measured by radial turbo-spin-echo (rTSE) and T2 measured by multiple gradient echo (MGRE) sequences.

Results: The multi-shot variant of the sequence achieved higher in-plane resolution of 1.7 × 1.7 mm2 with good image quality in 28 s. Derived quantitative maps showed comparable values to conventional mapping methods. As measured in phantom and in vivo, MOLLI, MESE and MGRE give closest values to MISAGE. VFA, HASTE and rTSE show obvious overestimation.

Conclusions: The proposed multi-shot inversion prepared spin- and gradient-echo EPI sequence allows for high-resolution quantitative T1 , T2 and T2 liver tissue characterization in a single breath-hold scan.

Keywords
  • Liver
  • Multi inversion spin and gradient echo
  • Multi-shot acquisitions
  • Parametric mapping
  • Magnetic Resonance Imaging / methods
  • Liver / diagnostic imaging
  • Breath Holding
  • Phantoms, Imaging
Affiliation entities Not a UNIGE publication
Citation (ISO format)
ZHANG, Ke et al. Simultaneous T1, T2 and T2⁎ mapping of the liver with multi-shot MI-SAGE. In: Magnetic resonance imaging, 2024, vol. 105, p. 75–81. doi: 10.1016/j.mri.2023.11.004
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Journal ISSN0730-725X
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