Duer-Jensen A et al. - Both extremity MRI (E-MRI) units detected more erosions than conventional radiography (CR), in particular due to a higher sensitivity in metacarpal heads and carpal bones. Methods
Aim was to compare the ability of two E-MRI units and CR for identifying bone erosions in RA metacarpophalangeal (MCP) and wrist joints
CR and two MRI examinations of 418 bones in the dominant wrist and second to fifth MCP joints of 15 pts with RA and 4 healthy controls
Results
In MCP joints, MagneVu visualised 18.5% of bones entirely and 71.1% were 67–99% visualized
In wrists, MagneVu visualised 1.5% of bones entirely, 39.8% were 67–99% visualised and 19% were not visualised at all
Artoscan and CR visualised all bones entirely
Artoscan, MagneVu and CR found 22, 19 and 15 bones with erosions in MCP joints and 66, 40 and 13 bones with erosions in wrist joints, respectively
MagneVu and CR had sensitivities of 0.82 and 0.55, respectively, in MCP joint bones and 0.41 and 0.14 in wrist bones
Specificities of CR and MagneVu were comparable
The MagneVu unit was particularly more sensitive than CR for metacarpal heads and carpal bones
MagneVu MRI and CR detected 100% and 89%, respectively, of large erosions in MCP joints and 69% and 15.8% of large erosions in wrists
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