title: Doppler US in rheumatic diseases with special emphasis on rheumatoid arthritis and spondyloarthritis.
abstract: Developments in digital ultrasonography (US) technology and the use of high-frequency broadband transducers have increased the quality of US imaging, particularly of superficial tissues. Thus, US, particularly color US or power Doppler US, in which high-resolution transducers are used, has become an important imaging modality in the assessment of rheumatic diseases. Furthermore, therapeutic interventions and biopsies can be performed under US guidance during the assessment of lesions. In this era of effective treatments, such as biologics, improvements in synovial inflammation in rheumatoid arthritis as well as changes in enthesitis in spondyloarthropathies, including ankylosing spondylitis and psoriatic arthritis, can be monitored effectively using gray-scale and/or power Doppler US. US is also a good imaging modality for crystal arthropathies, including gout and pseudogout, in which synovitis, erosions, tophi, and crystal deposition within or around the joint can be visualized readily. Vascular and tenosynovial structures, as well as the salivary glands, can be assessed with US in vasculitis and connective tissue disorders, including systemic lupus erythematosus and Sjögren's syndrome. Current research is focused on improving the sensitivity, specificity, validity, and reproducibility of US findings. In this review, we summarized the role of US, particularly power Doppler US, in rheumatic diseases and inflammation in superficial tissues.
authors.affiliation: From the Department of Radiology (H.T., A.S., E. Kocakoç e-mail: ercankocakoc@yahoo.com), Bezmialem Vakıf University School of Medicine, İstanbul, Turkey; the Division of Rheumatology (E.Kılıç, S.Ö.), Department of Physical Medicine and Rehabilitation, Erciyes University School of Medicine, Kayseri, Turkey.
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Toprak
authors.forename: Erkan
authors.initials: E
authors.lastname: Kılıç
authors.forename: Aslı
authors.initials: A
authors.lastname: Serter
authors.forename: Ercan
authors.initials: E
authors.lastname: Kocakoç
authors.forename: Salih
authors.initials: S
authors.lastname: Özgöçmen
mesh_terms: D015535:Arthritis, Psoriatic / Q000000981:diagnostic imaging; D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging*; D006801:Humans; D012216:Rheumatic Diseases / Q000000981:diagnostic imaging; D025241:Spondylarthritis / Q000000981:diagnostic imaging*; D013167:Spondylitis, Ankylosing / Q000000981:diagnostic imaging; D018608:Ultrasonography, Doppler