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dc.contributor.authorHonkanen, MKM
dc.contributor.authorMatikka, H
dc.contributor.authorHonkanen, JTJ
dc.contributor.authorBhattarai, A
dc.contributor.authorGrinstaff, MW
dc.contributor.authorJoukainen, A
dc.contributor.authorKröger, H
dc.contributor.authorJurvelin, JS
dc.contributor.authorTöyräs, J
dc.date.accessioned2020-01-23T08:12:00Z
dc.date.available2020-01-23T08:12:00Z
dc.date.issued2019
dc.identifier.urihttps://erepo.uef.fi/handle/123456789/7966
dc.description.abstractAssessment of cartilage composition via tomographic imaging is critical after cartilage injury to prevent post‐traumatic osteoarthritis. Diffusion of cationic contrast agents in cartilage is affected by proteoglycan loss and elevated water content. These changes have opposite effects on diffusion and, thereby, reduce the diagnostic accuracy of cationic agents. Here, we apply, for the first time, a clinical full‐body CT for dual contrast imaging of articular cartilage. We hypothesize that full‐body CT can simultaneously determine the diffusion and partitioning of cationic and non‐ionic contrast agents and that normalization of the cationic agent partition with that of the non‐ionic agent minimizes the effect of water content and tissue permeability, especially at early diffusion time points. Cylindrical (d = 8 mm) human osteochondral samples (n = 45; four cadavers) of a variable degenerative state were immersed in a mixture of cationic iodinated CA4+ and non‐charged gadoteridol contrast agents and imaged with a full‐body CT scanner at various time points. Determination of contrast agents’ distributions within cartilage was possible at all phases of diffusion. At early time points, gadoteridol, and CA4+ distributed throughout cartilage with lower concentrations in the deep cartilage. At ≥24 h, the gadoteridol concentration remained nearly constant, while the CA4+ concentration increased toward deep cartilage. Normalization of the CA4+ partition with that of gadoteridol significantly (p < 0.05) enhanced correlation with proteoglycan content and Mankin score at the early time points. To conclude, the dual contrast technique was found advantageous over single contrast imaging enabling more sensitive diagnosis of cartilage degeneration.
dc.language.isoenglanti
dc.publisherWiley
dc.relation.ispartofseriesJournal of orthopaedic research
dc.relation.urihttp://dx.doi.org/10.1002/jor.24256
dc.rightsCC BY http://creativecommons.org/licenses/by/4.0/
dc.subjectcartilage
dc.subjectcationic contrast agent
dc.subjectcontrast enhanced computed tomography
dc.subjectdual contrast agent
dc.subjectdual energy computed tomograph
dc.titleImaging of Proteoglycan and Water Contents in Human Articular Cartilage with Full-Body CT Using Dual Contrast Technique
dc.description.versionpublished version
dc.contributor.departmentDepartment of Applied Physics, activities
dc.contributor.departmentSchool of Medicine / Clinical Medicine
uef.solecris.id60850415en
dc.type.publicationTieteelliset aikakauslehtiartikkelit
dc.rights.accessrights© Authors
dc.relation.doi10.1002/jor.24256
dc.description.reviewstatuspeerReviewed
dc.format.pagerange1059-1070
dc.relation.issn0736-0266
dc.relation.issue5
dc.relation.volume37
dc.rights.accesslevelopenAccess
dc.type.okmA1
uef.solecris.openaccessEi


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