D. Hayashi, F.W. Roemer, A. Guermazi Osteoarthritis and Cartilage

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Osteoarthritis year 2012 in review: imaging

Presentation transcript:

Osteoarthritis year 2011 in review: imaging in OA – a radiologists’ perspective D. Hayashi, F.W. Roemer, A. Guermazi Osteoarthritis and Cartilage Volume 20, Issue 3, Pages 207-214 (March 2012) DOI: 10.1016/j.joca.2011.12.016 Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 Synovitis on contrast-enhanced MRI. Sagittal T1-weighted fat-suppressed contrast-enhanced spin echo MRI. A common localization of synovitis is behind the posterior cruciate ligament depicted as hyperintense synovial thickening (arrow). Note also presence of synovitis in the suprapatellar recess (no arrows). Osteoarthritis and Cartilage 2012 20, 207-214DOI: (10.1016/j.joca.2011.12.016) Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 Hoffa-synovitis and effusion-synovitis. A: Hyperintense signal within the intercondylar region of Hoffa’s fat pad (arrow) on PD-/T2 weighted fat-suppressed fast spin echo MRI is termed Hoffa-synovitis, a sensitive but non-specific measure of synovitis on non-enhanced MRI. B: Hyperintense signal in the joint cavity represents synovial thickening and joint fluid and is consequently termed effusion-synovitis (asterisks). Osteoarthritis and Cartilage 2012 20, 207-214DOI: (10.1016/j.joca.2011.12.016) Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 MRI assessment of hip OA. Coronal proton density-weighted MRI shows several features of advanced hip OA that may be semiquantitatively assessed. White arrows point to areas of bone marrow lesions in the femoral head and acetabulum. In addition, full thickness cartilage loss is shown in the central weight-bearing region (white arrowheads). A moderate amount of joint effusion is present (black arrowhead). Osteoarthritis and Cartilage 2012 20, 207-214DOI: (10.1016/j.joca.2011.12.016) Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions

Fig. 4 Definition of OA on MRI. Multiple MRI-based disease defining features are depicted: Group A features are an anterior osteophyte of the medial femur (white arrow) and diffuse full thickness cartilage loss of the central medial tibia (large white arrow). Group B features are a large subchondral bone marrow lesion in the weight-bearing region of the medial femur (white arrowheads), anterior extrusion of the anterior horn of the medial meniscus (short black arrow) and a horizontal tear of the posterior horn of the medial meniscus (thin black arrow). Osteoarthritis and Cartilage 2012 20, 207-214DOI: (10.1016/j.joca.2011.12.016) Copyright © 2012 Osteoarthritis Research Society International Terms and Conditions