Abstract：
:Biomechanical movement analysis in 3D requires estimation of joint centres in the lower extremities and this estimation is based on extrapolation from markers placed on anatomical landmarks. The purpose of the present study was to quantify the accuracy of three established set of equations and provide new improved equations to predict the joint centre locations. The 'true' joint centres of the knee and ankle joint were obtained in vivo by MRI scans on 10 male subjects whereas the 'true' hip joint centre was obtained in 10 male and 10 female cadavers by CT scans. For the hip joint the errors ranged from 26.7 (8.9) to 29.6 (7.5) mm, for the knee joint 5.8 (3.1) to 22.6 (3.3) mm and for the ankle joint 14.4 (2.2) to 27.0 (4.6) mm. This differed significantly from the improved equations by which the error for the hip joint ranged from 8.2 (3.6) to 11.6 (5.6) mm, for the knee joint from 2.9 (2.1) to 4.7 (2.5) mm and for the ankle joint from 3.4 (1.3) to 4.1 (2.0) mm. The coefficients in the new hip joint equations differed significantly between sexes. This difference depends on anatomical differences of the male and female pelvis.
journal_name
Med Eng Physjournal_title
Medical engineering & physicsauthors
Sandau M,Heimbürger RV,Villa C,Jensen KE,Moeslund TB,Aanæs H,Alkjær T,Simonsen EBdoi
10.1016/j.medengphy.2015.07.001subject
Has Abstractpub_date
2015-10-01 00:00:00pages
948-55issue
10eissn
1350-4533issn
1873-4030pii
S1350-4533(15)00173-3journal_volume
37pub_type
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