Page 92 - Imaging of Osteoarthritis and Rheumatoid Arthritis in Hand Joints
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Chapter 5
Cartilage thickness showed large variation in healthy controls (Figure 3). In the MCP joints the thickness varied between 0.3 and 0.9 mm with a mean of 0.6 mm (sd 0.1) mm, and in the PIP joints thickness varied between 0.2 and 0.7 mm with a mean of 0.4 mm (sd 0.1). These values showed a very large overlap with the hand OA patients. In the hand OA patients the mean cartilage thickness for MCP joints varied between 0.0 and 1.0 mm with a mean of 0.5 mm (sd 0.2) and values for PIP joints varied between 0.0 and 0.9mm with a mean of 0.4 mm (sd 0.1).
Figure 3. Variation of cartilage thickness in healthy controls. A+C: Sagittal SPGR images with fat suppression. B+D: Coronal FSE proton density image. A and B depict the same PIP joint in a healthy control with thick cartilage layers. C and D depict a PIP joint in a healthy control with thin cartilage layers.
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