Reproducibility and sensitivity to change of a new method of computer measurement of joint space width in hip osteoarthritis. Performance of three radiographic.

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Reproducibility and sensitivity to change of a new method of computer measurement of joint space width in hip osteoarthritis. Performance of three radiographic views obtained at a 3-year interval T. Conrozier, K. Brandt, M. Piperno, P. Mathieu, F. Merle-Vincent, E. Vignon Osteoarthritis and Cartilage Volume 17, Issue 7, Pages 864-870 (July 2009) DOI: 10.1016/j.joca.2008.12.003 Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 Detection of the minimum hip JSW using HOLY'S program. Treatment of the original image (A) to improve visualization of bone contours. (B) Three clicks on the contour of the femoral head lead to the automated detection of the head center. (C) One click below the upper part of the head creates a circle concentric to the precedent one which is the support for bone edge detection. (D) Two clicks delineate the segment of the area to be analyzed and lead to the automated detection of bone edges and of the minimum inter-bone distance. Osteoarthritis and Cartilage 2009 17, 864-870DOI: (10.1016/j.joca.2008.12.003) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 The computer screen at the moment of the measurement of the hip joint space with Holy's®. Osteoarthritis and Cartilage 2009 17, 864-870DOI: (10.1016/j.joca.2008.12.003) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 Correlation of JSW measurements according to the radiological view (oblique and AP hip; pelvis and AP hip). Osteoarthritis and Cartilage 2009 17, 864-870DOI: (10.1016/j.joca.2008.12.003) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions

Fig. 4 Inter-observer reproducibility of JSW measurement from AP hip radiographs: Bland and Altman plotting method. Osteoarthritis and Cartilage 2009 17, 864-870DOI: (10.1016/j.joca.2008.12.003) Copyright © 2008 Osteoarthritis Research Society International Terms and Conditions