New equations to calculate 3D joint centres in the lower extremities
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New equations to calculate 3D joint centres in the lower extremities. / Christiansen, Martin Sandau; Heimbürger, Rikke V; Villa, Chiara; Jensen, Karl Erik; Moeslund, Thomas B; Aanæs, Henrik; Alkjær, Tine; Simonsen, Erik B.
In: Medical Engineering & Physics, Vol. 37, No. 10, 10.2015, p. 948–955.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - New equations to calculate 3D joint centres in the lower extremities
AU - Christiansen, Martin Sandau
AU - Heimbürger, Rikke V
AU - Villa, Chiara
AU - Jensen, Karl Erik
AU - Moeslund, Thomas B
AU - Aanæs, Henrik
AU - Alkjær, Tine
AU - Simonsen, Erik B
N1 - Copyright © 2015 IPEM. Published by Elsevier Ltd. All rights reserved.
PY - 2015/10
Y1 - 2015/10
N2 - 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.
AB - 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.
U2 - 10.1016/j.medengphy.2015.07.001
DO - 10.1016/j.medengphy.2015.07.001
M3 - Journal article
C2 - 26320760
VL - 37
SP - 948
EP - 955
JO - Medical Engineering & Physics
JF - Medical Engineering & Physics
SN - 1350-4533
IS - 10
ER -
ID: 143317494