| Multi-rigid image segmentation and registration for the analysis of joint motion from three-dimensional magnetic resonance imaging. | |
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MedLine Citation:
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PMID: 22070330 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We report an image segmentation and registration method for studying joint morphology and kinematics from in vivo magnetic resonance imaging (MRI) scans and its application to the analysis of foot and ankle joint motion. Using an MRI-compatible positioning device, a foot was scanned in a single neutral and seven other positions ranging from maximum plantar flexion, inversion, and internal rotation to maximum dorsiflexion, eversion, and external rotation. A segmentation method combining graph cuts and level set was developed. In the subsequent registration step, a separate rigid body transformation for each bone was obtained by registering the neutral position dataset to each of the other ones, which produced an accurate description of the motion between them. The segmentation algorithm allowed a user to interactively delineate 14 foot bones in the neutral position volume in less than 30 min total (user and computer processing unit [CPU]) time. Registration to the seven other positions took approximately 10 additional minutes of user time and 5.25 h of CPU time. For validation, our results were compared with those obtained from 3DViewnix, a semiautomatic segmentation program. We achieved excellent agreement, with volume overlap ratios greater than 88% for all bones excluding the intermediate cuneiform and the lesser metatarsals. For the registration of the neutral scan to the seven other positions, the average overlap ratio is 94.25%, while the minimum overlap ratio is 89.49% for the tibia between the neutral position and position 1, which might be due to different fields of view (FOV). To process a single foot in eight positions, our tool requires only minimal user interaction time (less than 30 min total), a level of improvement that has the potential to make joint motion analysis from MRI practical in research and clinical applications. |
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Authors:
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Yangqiu Hu; William R Ledoux; Michael Fassbind; Eric S Rohr; Bruce J Sangeorzan; David Haynor |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of biomechanical engineering Volume: 133 ISSN: 1528-8951 ISO Abbreviation: J Biomech Eng Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-11-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7909584 Medline TA: J Biomech Eng Country: United States |
Other Details:
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Languages: eng Pagination: 101005 Citation Subset: IM |
Affiliation:
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Department of Bioengineering, University of Washington, Seattle, WA 98195; Department of Radiology, University of Washington, Seattle, WA 98195. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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