Page 111 - Imaging of Osteoarthritis and Rheumatoid Arthritis in Hand Joints
P. 111

 Accuracy of low field MRI in early arthritis
Figure 2. Example of synovitis that was scored differently at 0.2T and 1.5T in the radiocarpal joint. Axial T1-weighted images, (A) at 1.5T before contrast injection, (B) 1.5T after contrast injection, (C) 0.2T before contrast injection, and (D) 0.2T after contrast injection. Both MRIs show contrast enhancement (arrows), but this patient was scored RAMRIS synovitis grade 1 at 0.2T and RAMRIS synovitis grade 2 at 1.5T.
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Figure 3. Example of BME that was detected at 1.5T but not at 0.2T. (A) 1.5T T2-weighted image with fat saturation. (B) 0.2T STIR image. An area with higher signal intensity can be seen in the lunate bone at 1.5T (A, circle), indicating BME. BME is not visualized in the lunate bone, possibly because the general signal intensity within the bones is higher, concealing the BME in the lunate.
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