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Radiography in rheumatoid arthritis

Medical imaging is used to determine whether structural damage (bone erosion and/or articular cartilage loss) is present in the patient with rheumatoid arthritis. Conventional radiography is inexpensive, widely available, and relatively safe, and characteristic radiographic findings are part of the American College of Rheumatology (ACR) 1987 classification criteria, as well as the ACR/European League Against Rheumatism (EULAR) 2010 classification. Radiography can be helpful in differentiating RA from other joint conditions, such as psoriatic arthritis, osteoarthritis, and neoplasm. This chapter discussion outlines the technical and interpretative principles, as well as the challenges, associated with radiographic evaluation of RA, and points to ways of dealing with some of the most common pitfalls in routine clinical practice and research.