Comparison of spoiled gradient echo and steady-state free-precession imaging for native myocardial T1 mapping using the slice-interleaved T1 mapping (STONE) sequence
Cardiac T1 mapping allows non-invasive imaging of interstitial diffuse fibrosis. Myocardial T1 is commonly calculated by voxel-wise fitting of the images acquired using balanced steady-state free precession (SSFP) after an inversion pulse. However, SSFP imaging is sensitive to B1 and B0 imperfection...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
23 September 2016
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| In: |
NMR in biomedicine
Year: 2016, Volume: 29, Issue: 10, Pages: 1486-1496 |
| ISSN: | 1099-1492 |
| DOI: | 10.1002/nbm.3598 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1002/nbm.3598 Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/nbm.3598 
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| Author Notes: | Jihye Jang, Steven Bellm, Sébastien Roujol, Tamer A. Basha, Maryam Nezafat, Shingo Kato, Sebastian Weingärtner, Reza Nezafat |
MARC
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| 520 | |a Cardiac T1 mapping allows non-invasive imaging of interstitial diffuse fibrosis. Myocardial T1 is commonly calculated by voxel-wise fitting of the images acquired using balanced steady-state free precession (SSFP) after an inversion pulse. However, SSFP imaging is sensitive to B1 and B0 imperfection, which may result in additional artifacts. A gradient echo (GRE) imaging sequence has been used for myocardial T1 mapping; however, its use has been limited to higher magnetic field to compensate for the lower signal-to-noise ratio (SNR) of GRE versus SSFP imaging. A slice-interleaved T1 mapping (STONE) sequence with SSFP readout (STONE-SSFP) has been recently proposed for native myocardial T1 mapping, which allows longer recovery of magnetization (>8 R-R) after each inversion pulse. In this study, we hypothesize that a longer recovery allows higher SNR and enables native myocardial T1 mapping using STONE with GRE imaging readout (STONE-GRE) at 1.5T. Numerical simulations and phantom and in vivo imaging were performed to compare the performance of STONE-GRE and STONE-SSFP for native myocardial T1 mapping at 1.5T. In numerical simulations, STONE-SSFP shows sensitivity to both T2 and off resonance. Despite the insensitivity of GRE imaging to T2, STONE-GRE remains sensitive to T2 due to the dependence of the inversion pulse performance on T2. In the phantom study, STONE-GRE had inferior accuracy and precision and similar repeatability as compared with STONE-SSFP. In in vivo studies, STONE-GRE and STONE-SSFP had similar myocardial native T1 times, precisions, repeatabilities and subjective T1 map qualities. Despite the lower SNR of the GRE imaging readout compared with SSFP, STONE-GRE provides similar native myocardial T1 measurements, precision, repeatability, and subjective image quality when compared with STONE-SSFP at 1.5T. | ||
| 650 | 4 | |a balanced steady-state free precession | |
| 650 | 4 | |a cardiovascular MR (CMR) methods | |
| 650 | 4 | |a myocardial T1 mapping | |
| 650 | 4 | |a relaxometry | |
| 650 | 4 | |a slice-interleaved T1 mapping | |
| 650 | 4 | |a spoiled gradient echo | |
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