Usefulness of MR imaging for diagnosing rheumatoid arthritis

DOI 4 References
  • UCHIYAMA Yuka
    Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry
  • MURAKAMI Shumei
    Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry
  • NISHIYAMA Hideyoshi
    Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry
  • SASAI Tadashi
    Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry
  • FURUKAWA Souhei
    Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry

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  • 慢性関節リウマチの画像診断におけるＭＲ画像の有用性

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Objective: To assess the effectiveness of magnetic resonance imaging (MRI) for the diagnosis of rheumatoid arthritis (RA) in the temporomandibular joint (TMJ), MRI was performed on RA patients with TMJ involvement.<BR>Methods: Six patients (all women) with TMJ involvement, of average age 49.8 years (range 24∼70), who had been serologically or clinically diagnosed with RA by orthopedists, were enrolled. Diagnostic imaging included plain radiography (panoramic radiography and lateral oblique transcranial projection), multisection tomography, and MRI, such as Proton density MRI, T1-weighted MRI and T2-weighted MRI. On each examination, bone changes of the TMJ and soft tissue in the TMJ were evaluated.<BR>Results: MRI showed that 9 of the 12 joints had bone changes, including erosion and osteophyte; disks were invisible in 5 joints; disks were superior to the condyle in 6 joints, and one disk had anterior disk displacement without reduction. On T2-weighted MR images, 5 joints had high signal intensity. Only one joint was suspected of having pannus.<BR>Conclusion: It was concluded that the effectiveness of visualizing bone changes of the TMJ by MRI was similar to that by conventional radiographic examination. MRI also visualized abnormal soft tissue in the TMJ. Thus, MRI might be a useful technique for evaluation in RA patients.

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