Rheumatology Medical News about osteoarthritis;semiquantitative whole organ assessment

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A comparison of dedicated 1.0 T extremity MRI vs. large-bore 1.5 T MRI for semiquantitative whole organ assessment of osteoarthritis: the MOST study
Osteoarthritis and Cartilage , 09/18/09

Roemer FW et al. – Semiquantitative whole organ scoring can be performed using a 1.0 T peripheral scanner with a moderate to high degree of agreement and accuracy compared to SQ assessment using a 1.5 T whole body scanner.

Methods

A sample of 53 knees was selected in which MRI was performed on a 1.0 T extremity system as well as on a 1.5 T scanner applying a comparable sequence protocol
MRIs were read according to the Whole Organ Magnetic Resonance Imaging Score (WORMS) score

Results

Agreement (w-kappa) for 7 main WORMS features (cartilage, bone marrow lesions, osteophytes, meniscal damage and extrusion, synovitis, effusion) ranged between 0.54 (synovitis) and 0.75 (cartilage)
Sensitivity ranged between 68.1% (meniscal damage) and 88.1% (effusion)
Specificity ranged between 63.6% (effusion) and 96.4% (bone marrow lesions)
Although the overall rate of non-readable features was very low, it was higher for the 1.0 T system (1.9% vs 0.2%)

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