MR-oximetry with fat DESPOT

Fortier, Véronique; Levesque, Ives R.

doi:10.1016/j.mri.2022.12.023

Magnetic Resonance Imaging

2023

DOI: 10.1016/j.mri.2022.12.023

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MR-oximetry with fat DESPOT

Véronique Fortier

Ives R. Levesque

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2024

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R₂* Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T

Fortier,

Mohamed,

McNabb

et al. 2024

Can Assoc Radiol J

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Rationale and Objectives: Fat quantification accuracy using a commercial single-voxel high speed T2-corrected multi-echo (HISTO) technique and its robustness to R2* variations at 3.0 T, such as those introduced by iron in liver, has not been fully established. This study evaluated HISTO at 3.0 T and sought to reproduce results at 1.5 T. Methods: Phantoms were prepared with a range of fat content and R2*. Data were acquired at 1.5 T and 3.0 T, using HISTO and a Dixon technique. Fat quantification accuracy was evaluated as a function of R2*. The patient study included 239 consecutive patients. Data were acquired at 1.5 T or 3.0 T, using HISTO and Dixon techniques. The techniques were compared using Bland-Altman plots. Bias significance was evaluated using a one-sample t-test. Results: In phantoms, HISTO was accurate within 10% up to a R2* of 100 s−1 at both field strengths, while Dixon was accurate within 10% where R2* was accurately quantified (up to 350 s−1 at 1.5 T, and 550 s−1 at 3.0 T). In patients, where R2* was <100 s−1, fat quantification from both techniques agreed at 1.5 T ( P = .71), but not at 3.0 T ( P = .007), with a bias <1%. Conclusion: Results suggest that HISTO is reliable when R2* is <100 s−1, corresponding to patients with at most mild liver iron overload, and that it should be used with caution when R2* is >100 s−1. Dixon should be preferred for hepatic fat quantification due to its robustness to R2* variations.

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R₂* Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T

Fortier,

Mohamed,

McNabb

et al. 2024

Can Assoc Radiol J

View full text Add to dashboard Cite

show abstract

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MR-oximetry with fat DESPOT

Cited by 1 publication

References 57 publications

R₂* Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T

R₂* Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T

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MR-oximetry with fat DESPOT

Cited by 1 publication

References 57 publications

R2* Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T

R2* Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T

Contact Info

Product

Resources

About

R₂* Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T

R₂* Impact on Hepatic Fat Quantification With a Commercial Single Voxel Technique at 1.5 and 3.0 T