Radiography is commonly used to evaluate osteoarthritis at the thumb carpometacarpal (CMC) joint, but newer quantitative magnetic resonance imaging (MRI) techniques provide additional information regarding biochemical composition of trapezial (TM ) and 1st metacarpal (MC) articular cartilage. Morphologic MRI and quantitative T1ρ and T2 mapping of the thumb CMC joint was performed. T1ρ and T2 values of the TM and MC were similar, and full ligamentous tears were not found. This pilot study showed that quantitative T1ρ and T2 mapping is feasible at the human thumb CMC joint.
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