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Automatic quantification of osteoarthritis in hand radiographs: validation of a new method to measure joint space width  R. van 't Klooster, M.Sc., E.A.

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Presentation on theme: "Automatic quantification of osteoarthritis in hand radiographs: validation of a new method to measure joint space width  R. van 't Klooster, M.Sc., E.A."— Presentation transcript:

1 Automatic quantification of osteoarthritis in hand radiographs: validation of a new method to measure joint space width  R. van 't Klooster, M.Sc., E.A. Hendriks, Ph.D., I. Watt, F.R.C.P., F.R.C.R., M. Kloppenburg, M.D., Ph.D., J.H.C. Reiber, Ph.D., B.C. Stoel, Ph.D.  Osteoarthritis and Cartilage  Volume 16, Issue 1, Pages (January 2008) DOI: /j.joca Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

2 Fig. 1 (a) Test hand. (b) Gabor result. (c) Gabor result with the candidate positions marked by a white square, the big square is the centre of gravity. (d) Centrelines through fingers. (e) Twelve joint locations. Osteoarthritis and Cartilage  , 18-25DOI: ( /j.joca ) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

3 Fig. 2 Anatomical model with the (mean) joint locations. The most left location is the aligned centre of gravity of the images. Osteoarthritis and Cartilage  , 18-25DOI: ( /j.joca ) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

4 Fig. 3 Determination of the measurement interval.
Osteoarthritis and Cartilage  , 18-25DOI: ( /j.joca ) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

5 Fig. 4 (a) Success rates of the identification of the proximal and distal margins in the JSN− group, shown per joint group and all joint types together. (b) Success rates of the identification of the proximal and distal margins in the JSN+ group, shown per joint group and all joint types together. Osteoarthritis and Cartilage  , 18-25DOI: ( /j.joca ) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

6 Fig. 5 Association between JSW and semi-quantitative score per joint type. Osteoarthritis and Cartilage  , 18-25DOI: ( /j.joca ) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

7 Fig. 6 Association between mean JSW and mean semi-quantitative score per subject. Osteoarthritis and Cartilage  , 18-25DOI: ( /j.joca ) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

8 Fig. 7 MCP joint showing the automatic identified contour and the true contour. Osteoarthritis and Cartilage  , 18-25DOI: ( /j.joca ) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

9 Fig. 8 (a) JSW=0.73mm, semi-quantitative score=0 (ring distal interphalangeal RDIP). (b) JSW=0.73mm, semi-quantitative score=1 (index distal interphalangeal IDIP). (c) JSW=0.72mm, semi-quantitative score=2 (IDIP). (d) JSW=0.74mm, semi-quantitative score=3 (IDIP). Osteoarthritis and Cartilage  , 18-25DOI: ( /j.joca ) Copyright © 2007 Osteoarthritis Research Society International Terms and Conditions

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