Modified Larsen scoring of digitized radiographs in rheumatoid arthritis.

Objective: To facilitate storage, retrieval, and analysis of radiographic images we assessed the validity of a film digitizer and computer based system.

Methods: A total of 101 sets of radiographs of hands and feet from patients with early rheumatoid arthritis were digitized according to standards defined by the American College of Radiology. Two blinded observers applied the modified Larsen score to the digitized images and the original radiographs.