24 March 2014 Dynamic automated synovial imaging (DASI) for differential diagnosis of rheumatoid arthritis
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Abstract
Inflammatory rheumatic diseases are leading causes of disability and constitute a frequent medical disorder, leading to inability to work, high comorbidity and increased mortality. The gold-standard for diagnosing and differentiating arthritis is based on patient conditions and radiographic findings, as joint erosions or decalcification. However, early signs of arthritis are joint effusion, hypervascularization and synovial hypertrophy. In particular, vascularization has been shown to correlate with arthritis’ destructive behavior, more than clinical assessment. Contrast Enhanced Ultrasound (CEUS) examination of the small joints is emerging as a sensitive tool for assessing vascularization and disease activity. The evaluation of perfusion pattern rely on subjective semiquantitative scales, that are able to capture the macroscopic degree of vascularization, but are unable to detect the subtler differences in kinetics perfusion parameters that might lead to a deeper understanding of disease progression and a better management of patients. We show that after a kinetic analysis of contrast agent appearance, providing the quantitative features characterizing the perfusion pattern of the joint, it is possible to accurately discriminate RA from PSA by building a random forest classifier on the computed features. We compare its accuracy with the assessment performed by expert radiologist blinded of the diagnosis.
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E. Grisan, B. Raffeiner, A. Coran, G. Rizzo, L. Ciprian, R. Stramare, "Dynamic automated synovial imaging (DASI) for differential diagnosis of rheumatoid arthritis", Proc. SPIE 9035, Medical Imaging 2014: Computer-Aided Diagnosis, 903514 (24 March 2014); doi: 10.1117/12.2042964; https://doi.org/10.1117/12.2042964
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