T1 and T2 measurements across multiple 0.55T MRI systems using open-source vendor-neutral sequences.

Autor: Keenan KE; National Institute of Standards and Technology, Boulder, Colorado, USA., Tasdelen B; Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California, USA., Javed A; Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, Blood Institute, National Institutes of Health, Bethesda, Maryland, USA., Ramasawmy R; Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, Blood Institute, National Institutes of Health, Bethesda, Maryland, USA., Rizzo R; Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA., Martin MN; National Institute of Standards and Technology, Boulder, Colorado, USA., Stupic KF; National Institute of Standards and Technology, Boulder, Colorado, USA., Seiberlich N; Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA., Campbell-Washburn AE; Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, Blood Institute, National Institutes of Health, Bethesda, Maryland, USA., Nayak KS; Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California, USA.
Jazyk: angličtina
Zdroj: Magnetic resonance in medicine [Magn Reson Med] 2024 Sep 01. Date of Electronic Publication: 2024 Sep 01.
DOI: 10.1002/mrm.30281
Abstrakt: Purpose: To compare T1 and T2 measurements across commercial and prototype 0.55T MRI systems in both phantom and healthy participants using the same vendor-neutral pulse sequences, reconstruction, and analysis methods.
Methods: Standard spin echo measurements and abbreviated protocol measurements of T1, B1, and T2 were made on two prototype 0.55 T systems and two commercial 0.55T systems using an ISMRM/NIST system phantom. Additionally, five healthy participants were imaged at each system using the abbreviated protocol for T1, B1, and T2 measurement. The phantom measurements were compared to NMR-based reference measurements to determine accuracy, and both phantom and in vivo measurements were compared to assess reproducibility and differences between the prototype and commercial systems.
Results: Vendor-neutral sequences were implemented across all four systems, and the code for pulse sequences and reconstruction is freely available. For participants, there was no difference in the mean T1 and T2 relaxation times between the prototype and commercial systems. In the phantom, there were no significant differences between the prototype and commercial systems for T1 and T2 measurements using the abbreviated protocol.
Conclusion: Quantitative T1 and T2 measurements at 0.55T in phantom and healthy participants are not statistically different across the prototype and commercial systems.
(© 2024 International Society for Magnetic Resonance in Medicine. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.)
Databáze: MEDLINE
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