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Table 3 Reanalysis precision of hand and muscle volume (measured in the T1 image) and of muscle fat content and ratio (measured in the Dixon images) Precision are shown as root mean square average of the standard deviation displayed in the unit of the variable and of the coefficient of variation displayed in %

From: Quantification of hand muscle volume and composition in patients with rheumatoid arthritis, psoriatic arthritis and psoriasis

 

Hand volume

Muscle volume

Fat content

Fat fraction

Interoperator

5.0 mm3

0.19%

1.5 mm3

0.24%

364.4 mm3

0.60%

0.09%

0.07%

Intraoperator

3.4 mm3

0.13%

0.35 mm3

0.05%

41.6 mm3

0.10%

0.006%

0.04%