Radiostereometric analysis of hemiarthroplasties of the hip – a highly precise method for measurements of cartilage wear  W. Figved, J. Dahl, F. Snorrason,

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Radiostereometric analysis of hemiarthroplasties of the hip – a highly precise method for measurements of cartilage wear  W. Figved, J. Dahl, F. Snorrason, F. Frihagen, S. Röhrl, J.E. Madsen, L. Nordsletten  Osteoarthritis and Cartilage  Volume 20, Issue 1, Pages 36-42 (January 2012) DOI: 10.1016/j.joca.2011.11.006 Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 The phantom model (left) and a radiostereometric image (right) with Ta markers in the pelvis (numbered) and in the calibration cage. The centre of the prosthetic head has been computer-calculated using edge detection. Osteoarthritis and Cartilage 2012 20, 36-42DOI: (10.1016/j.joca.2011.11.006) Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 A radiograph showing a cemented bipolar hemiarthroplasty of the right hip. Ta markers have been implanted around the acetabulum, in the anterior superior iliac spine, and in the superior pubic ramus. Osteoarthritis and Cartilage 2012 20, 36-42DOI: (10.1016/j.joca.2011.11.006) Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 Graph showing the 3D TPM of 16 patients at 3 months and 14 patients at 12 months. Each line represents one patient. Black line represents the mean TPM of all patients. Osteoarthritis and Cartilage 2012 20, 36-42DOI: (10.1016/j.joca.2011.11.006) Copyright © 2011 Osteoarthritis Research Society International Terms and Conditions