Journal
JOURNAL OF MAGNETIC RESONANCE IMAGING
Volume 28, Issue 2, Pages 504-508Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/jmri.21431
Keywords
fast spin echo; magnetic resonance imaging; water-fat separation; tongue; deglutition; sarcopenia
Funding
- NCRR NIH HHS [K12 RR023268, 8K12RR023268-02] Funding Source: Medline
- NIDCD NIH HHS [L30 DC008513, L30 DC008513-01] Funding Source: Medline
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Purpose: To determine whether high-resolution, high signal-to-noise ratio (SNR) images of the tongue acquired with IDEAL-FSE (iterative decomposition of water and fat with echo asymmetry and least squares estimation) will provide comparable volumetric measures to conventional nonfat-suppressed FSE imaging and to determine the feasibility of estimating the proportion of lingual fat in adults using IDEAL-FSE imaging. Materials and Methods: Healthy volunteers underwent magnetic resonance imaging of the tongue using both IDEAL-FSE and conventional FSE sequences. The tongue was manually outlined to derive both volumetric and fat fraction measures. Intraclass correlation coefficients (ICCs) were computed for intrarater measurement reliability and Spearman's rank correlation tested the relationship between IDEAL-FSE and conventional volumetric measures of the tongue. Results: IDEAL-FSE imaging yielded almost identical volumetric measures to that of conventional FSE imaging in the same amount of scan time (IDEAL-FSE mean 64.1 cm(3); conventional mean 63.3 cm(3); r = 0.988, P <= 0.01). The average fat signal fraction across participants was 26.5%. Intrarater reliability was excellent for all measures (ICC >= 0.92). Conclusion: Our results indicate that IDEAL-FSE provided similar lingual volume estimates to conventional FSE imaging obtained in both the current and previous studies. IDEAL-FSE measures of lingual fat composition may be useful in studies that aim to increase lingual muscle strength and volume in swallowing and speech-disordered populations.
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