The current status of ultrasonography in rheumatology.
D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging*; D006801:Humans; D009141:Musculoskeletal System / Q000000981:diagnostic imaging*; D012219:Rheumatology; D013122:Spinal Diseases / Q000000981:diagnostic imaging; D013167:Spondylitis, Ankylosing / Q000000981:diagnostic imaging; D014463:Ultrasonography / Q000639:trends*