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J Magn Reson Imaging. 2013 Sep;38(3):619-24. doi: 10.1002/jmri.23998. Epub 2013 Jan 4.

Comparison of dixon and T1-weighted MR methods to assess the degree of fat infiltration in duchenne muscular dystrophy patients.

Author information

1
Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands. b.h.a.wokke@lumc.nl

Abstract

PURPOSE:

To compare different lipid multipeak spectral models to the single-peak model in Dixon-based fat-water separation and to evaluate differences between visually scored magnetic resonance (MR) images and quantitatively assessed fat fractions in muscle of Duchenne muscular dystrophy patients.

MATERIALS AND METHODS:

T1-weighted and 3-point Dixon imaging of the upper and lower leg was performed in 13 Duchenne patients and six healthy controls. Three-, four-, and five-peak lipid spectrum models were compared to a single-peak model and to each other. T1-weighted images were visually scored by two radiologists and quantitative fat fractions were obtained from Dixon images.

RESULTS:

Differences between the multipeak spectral models were minimal. The three-peak model was used for subsequent comparisons. Although there was high correlation between quantitative and visual scores, visual scores were consistently higher than quantitative values of the same muscles.

CONCLUSION:

There are minor differences between the various lipid spectral models in terms of quantifying fat fraction in a large number of skeletal muscles in the legs of Duchenne patients and healthy controls. Quantitative 3-point Dixon MRI is more precise and reliable than visual radiological methods for evaluation of fat fractions for potential longitudinal follow-up or therapy evaluation of Duchenne patients.

KEYWORDS:

Duchenne muscular dystrophy; fatty infiltration; quantitative MRI

PMID:
23292884
DOI:
10.1002/jmri.23998
[Indexed for MEDLINE]

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