| Reproducibility analysis of diffusion tensor indices and fiber architecture of human calf muscles in vivo at 1.5 Tesla in neutral and plantarflexed ankle positions at rest. | |
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MedLine Citation:
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PMID: 21608064 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To investigate the reproducibility of diffusion tensor imaging (DTI) -derived indices and fiber architecture of calf muscles at 1.5 Tesla (T), to establish an imaging based method to confirm ankle position, and to compare fiber architecture at different ankle positions. MATERIALS AND METHODS: Six subjects were imaged at 1.5T with the foot in neutral and plantarflexed positions. DTI indices were calculated in four muscle compartments (medial and lateral gastrocnemius [MG, LG], superficial and deep anterior tibialis [AT-S, AT-D]). Two subjects were scanned on 3 days to calculate the coefficient of variability (CV) and the repeatability coefficient (RC). RESULTS: DTI indices were close to the values obtained in earlier 3T and 1.5T studies. Fractional anisotropy decreased significantly in the MG and increased significantly in the AT-S and AT-D compartments while fiber orientation with respect to the magnet Z-axis increased significantly in the MG and decreased significantly in the AT-S compartment with plantarflexion. The CV and RC for the DTI indices and fiber orientations were comparable to 3T studies. Fiber lengths and orientation angles in the MG matched corresponding measures from ultrasound studies. CONCLUSION: DTI at 1.5T provides reproducible measures of diffusion indices and fiber architecture of calf muscle at different muscle lengths. |
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Authors:
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Shantanu Sinha; Usha Sinha |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2011-05-23 |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 34 ISSN: 1522-2586 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-06-23 Completed Date: 2011-11-04 Revised Date: 2013-05-16 |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 107-19 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Wiley-Liss, Inc. |
Affiliation:
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Muscle Imaging and Modeling Laboratory, Department of Radiology, University of California, San Diego, California 92121-0852, USA. shsinha@ucsd.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Anisotropy Ankle / pathology* Diffusion Diffusion Tensor Imaging / methods Female Humans Image Processing, Computer-Assisted / methods Magnetic Resonance Imaging / methods* Male Models, Statistical Muscle Fibers, Skeletal / pathology Muscle, Skeletal / pathology* Reproducibility of Results |
| Grant Support | |
ID/Acronym/Agency:
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R01 AR053343/AR/NIAMS NIH HHS; R01 AR053343-04/AR/NIAMS NIH HHS; R01-AR-53343/AR/NIAMS NIH HHS |
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