| The effects of orientation, temperature, and displacement magnitude changes on the sonometrics system accuracy. | |
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MedLine Citation:
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PMID: 16214497 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The accuracy and reliability of a sonomicrometry system (Sonometrics Corporation, Ontario, Canada) was evaluated for its potential use in measuring 3-D in vivo joint kinematics. Distances between different sets of piezoelectric crystals were measured through a salt solution using ultrasound technology. We evaluated crystal-to-crystal distance under simulated in vivo conditions of changing crystal orientation and displacement magnitude. Crystal-to-crystal distance was also evaluated under changing solution temperature, since the crystals may be used at different temperatures. The 2 mm round and peg crystals were accurate to within 0.5mm for 0 through 180 degrees rotations, but the 2mm round suture loop crystals were only reliable at 0 degrees rotation. The speed of sound through a salt solution (and hence the distance between crystals) versus temperature was fit using a second order polynomial, C=1421.1+3.9808T-3.09x10(-2)T2, with an R2 value of 0.9998. The translational error was less than 0.072 mm for crystal displacements of 0.012, 0.2, 1.0, and 5.0 mm. The system was also accurate under dynamic conditions with translational errors that were less than 0.045 mm under 0.65 Hz motion. These results suggest that the Sonometrics crystals possess attributes (translational accuracy and rotational independence) that could provide the basis for a system capable of measuring joint kinematics. |
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Authors:
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N S Sipes; J T Shearn; D L Butler |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Journal of biomechanics Volume: 38 ISSN: 0021-9290 ISO Abbreviation: J Biomech Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2005-10-10 Completed Date: 2006-01-20 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0157375 Medline TA: J Biomech Country: United States |
Other Details:
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Languages: eng Pagination: 2486-90 Citation Subset: IM |
Affiliation:
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Department of Cell Biology, Neurobiology, and Anatomy, University of Cincinnati, Cincinnati, OH, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Equipment Design Equipment Failure Analysis Humans Joints / physiology*, ultrasonography* Phantoms, Imaging Range of Motion, Articular / physiology* Reproducibility of Results Sensitivity and Specificity Temperature Ultrasonography / instrumentation* |
| Grant Support | |
ID/Acronym/Agency:
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AR46574/AR/NIAMS NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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