Show simple item record

dc.contributor.authorErskine, Robert M
dc.contributor.authorMorse, Christopher I
dc.contributor.authorDay, Stephen H
dc.contributor.authorWilliams, Alun G
dc.contributor.authorOnambele-Pearson, Gladys L
dc.date.accessioned2019-06-13T10:57:33Z
dc.date.available2019-06-13T10:57:33Z
dc.date.issued2014-02-19
dc.identifier.citationErskine, Robert M., Morse, Christopher I., Day, Stephen H., Williams, Alun G., Onambele-Pearson, Gladys L. (2014) The human patellar tendon moment arm assessed in vivo using dual-energy X-ray absorptiometry, Journal of Biomechanics, 47(6), pp. 1294-1298.en
dc.identifier.issn0021-9290en
dc.identifier.doi10.1016/j.jbiomech.2014.02.016en
dc.identifier.urihttp://hdl.handle.net/2436/622440
dc.description.abstractAccurate assessment of muscle–tendon forces in vivo requires knowledge of the muscle–tendon moment arm. Dual-energy X-ray absorptiometry (DXA) can produce 2D images suitable for visualising both tendon and bone, thereby potentially allowing the moment arm to be measured but there is currently no validated DXA method for this purpose. The aims of this study were (i) to compare in vivo measurements of the patellar tendon moment arm (dPT) assessed from 2D DXA and magnetic resonance (MR) images and (ii) to compare the reliability of the two methods. Twelve healthy adults (mean±SD: 31.4±9.5 yr; 174.0±9.5 cm; 76.2±16.6 kg) underwent two DXA and two MR scans of the fully extended knee at rest. The tibiofemoral contact point (TFCP) was used as the centre of joint rotation in both techniques, and the dPT was defined as the perpendicular distance from the patellar tendon axis to the TFCP. The dPT was consistently longer when assessed via DXA compared to MRI (+3.79±1.25 mm or +9.78±3.31%; P<0.001). The test–retest reliability of the DXA [CV=2.13%; ICC=0.94; ratio limits of agreement (RLA)=1.01 (⁎/÷1.07)] and MR [(CV=2.27%; ICC=0.96; RLA=1.00 (⁎/÷1.07)] methods was very high and comparable between techniques. Moreover, the RLA between the mean DXA and MRI dPT values [1.097 (⁎/÷1.061)] demonstrated very strong agreement between the two methods. In conclusion, highly reproducible dPT measurements can be determined from DXA imaging with the knee fully extended at rest. This has implications for the calculation of patellar tendon forces in vivo where MR equipment is not available.en
dc.formatapplication/PDFen
dc.languageen
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttps://www.sciencedirect.com/science/article/pii/S0021929014001109?via%3Dihuben
dc.subjectpatellar tendonen
dc.subjectmoment armen
dc.subjectdual-energy x-rayen
dc.subjectdual-energy x-ray absorptiometry (DXA)en
dc.subjectmagnetic resonance imaging (MRI)en
dc.titleThe human patellar tendon moment arm assessed in vivo using dual-energy X-ray absorptiometryen
dc.typeJournal articleen
dc.identifier.journalJournal of Biomechanicsen
dc.date.updated2019-06-04T08:17:34Z
dc.date.accepted2014-02-14
rioxxterms.funderUniversity of Wolverhamptonen
rioxxterms.identifier.projectUOW130619SDen
rioxxterms.versionAMen
rioxxterms.licenseref.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
rioxxterms.licenseref.startdate2019-06-13en
dc.source.volume47
dc.source.issue6
dc.source.beginpage1294
dc.source.endpage1298
dc.description.versionPublished version
refterms.dateFCD2019-06-13T10:57:24Z
refterms.versionFCDAM
refterms.dateFOA2019-06-13T10:57:34Z


Files in this item

Thumbnail
Name:
Publisher version
Thumbnail
Name:
The human patellar tendon moment ...
Size:
203.2Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record