Accelerated quantification of tissue sodium concentration in skeletal muscle tissue: quantitative capability of dictionary learning compressed sensing

Objective To accelerate tissue sodium concentration (TSC) quantification of skeletal muscle using 23 Na MRI and 3D dictionary-learning compressed sensing (3D-DLCS). Materials and methods Simulations and in vivo 23 Na MRI examinations of calf muscle were performed with a nominal spatial resolution of...

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Vydané v:Magma (New York, N.Y.) Ročník 33; číslo 4; s. 495 - 505
Hlavní autori: Utzschneider, Matthias, Behl, Nicolas G. R., Lachner, Sebastian, Gast, Lena V., Maier, Andreas, Uder, Michael, Nagel, Armin M.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Cham Springer International Publishing 01.08.2020
Predmet:
Basic Science - Reconstruction algorithms and artificial intelligence
Biomedical Engineering and Bioengineering
Computer Appl. in Life Sciences
Health Informatics
Imaging
Medicine
Medicine & Public Health
Radiology
Research Article
Solid State Physics
Muscle
Magnetic resonance imaging
Sodium
Skeletal
Image reconstruction
Compressed sensing
ISSN:0968-5243, 1352-8661, 1352-8661
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Shrnutí:Objective To accelerate tissue sodium concentration (TSC) quantification of skeletal muscle using 23 Na MRI and 3D dictionary-learning compressed sensing (3D-DLCS). Materials and methods Simulations and in vivo 23 Na MRI examinations of calf muscle were performed with a nominal spatial resolution of Δ x = 3.0 × 3.0 × 15.0 mm 3 . Fully sampled and three undersampled 23 Na MRI data sets (undersampling factors (USF) = 3, 4.4, 6.7) were evaluated. Ten healthy subjects were examined on a 3 Tesla MRI system. Results of the simulation study and the in vivo measurements were compared to the ground truth (GT) and the fully sampled fast Fourier transform (NUFFT) reconstruction, respectively. Results Reconstruction results of simulated data with optimized 3D-DLCS yielded a lower deviation (< 4%) from the GT than results of the NUFFT reconstruction (> 5%) and a lower standard deviation (SD). For in vivo measurements, a TSC of 17 ± 2.7 mMol/l was observed. The mean deviation from the reference is lower for the undersampled 3D-DLCS reconstructions (3.4%) than for NUFFT reconstructions (4.6%). SD is reduced using 3D-DLCS. Compared to a fully sampled NUFFT reconstruction, acquisition time could be reduced by a factor of 4.4 while maintaining similar quantitative accuracy. Discussion The optimized 3D-DLCS reconstruction enables accelerated TSC measurements with high quantification accuracy.
Bibliografia:ObjectType-Article-1
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content type line 23
ISSN:0968-5243
1352-8661
1352-8661
DOI:10.1007/s10334-019-00819-2