Validation of a freehand 3D ultrasound system for morphological measures of the medial gastrocnemius muscle

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Title Validation of a freehand 3D ultrasound system for morphological measures of the medial gastrocnemius muscle
Author Barber, Lee Anthony; Barrett, Rod; Lichtwark, Glen Anthony
Journal Name Journal of Biomechanics
Year Published 2009
Place of publication Oxford, UK
Publisher Pergamon Press
Abstract Muscle volume and length are important parameters for examining the force-generating capabilities of muscle and their evaluation is necessary in studies that investigate muscle morphology and mechanical changes due to age, function, pathology, surgery and training. In this study, we assessed the validity and reliability of in vivo muscle volume and muscle belly length measurement using a multiple sweeps freehand 3D ultrasound (3DUS). The medial gastrocnemius of 10 subjects was scanned at three ankle joint angles (15 degrees , 0 degrees and -15 degrees dorsiflexion) three times using the freehand 3DUS and once on the following day using magnetic resonance imaging (MRI). All freehand 3DUS and MRI images were segmented, volumes rendered and volumes and muscle belly lengths measured. The freehand 3DUS overestimated muscle volume by 1.9+/-9.1 mL, 1.1+/-3.8% difference and underestimated muscle belly length by 3.0+/-5.4mm, 1.3+/-2.2% difference. The intra-class correlation coefficients (ICC) for repeated freehand 3DUS system measures of muscle volume and muscle belly length were greater than 0.99 and 0.98, respectively. The ICCs for the segmentation process reliability for the freehand 3DUS system and MRI for muscle volume were both greater than 0.99 and muscle belly length were 0.97 and 0.99, respectively. Freehand 3DUS is a valid and reliable method for the measurement of human muscle volume and muscle belly length in vivo. It could be used as an alternative to MRI for measuring in vivo muscle morphology and thus allowing the determination of PCSA and estimation of the force-generating capacity of individual muscles within the setting of a biomechanics laboratory.
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 2009 Elsevier. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 42
Issue Number 9
Page from 1313
Page to 1319
ISSN 0021-9290
Date Accessioned 2009-09-23
Language en_AU
Research Centre Centre for Musculoskeletal Research; Menzies Health Institute Qld
Faculty Griffith Health Faculty
Subject Biomechanics; Medical and Health Sciences
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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