R rheumatoid arthritis x ray

The 20 MHz transducers have an axial resolution power of 0.038 mm.However, further research using these sensitive imaging technologies is required to delineate pathophysiological correlates of imaging abnormalities and to standardise methods for assessment.Optimal ultrasound equipment for musculoskeletal work should be equipped with standard 7.5–10 MHz transducers for conventional examination.Preservation of joint integrity is closely associated with maintenance of functional capability.X-ray evaluation of rheumatoid joints is relatively inexpensive, is widely available and has standardised methods for interpretation.The most important technical requirement for joint US is a high-quality imaging system.Recent developments in US technology have allowed the realisation of high-resolution broadband transducers (5–10, 8–16 and 10–22 MHz).The assessment of structural damage by CR relates poorly to function in early RA, although in disease of 5 years' duration or longer there is a weak but significant correlation [].However, the 20 MHz transducers have a limited image field of view, have poor beam penetration and do not allow the evaluation of structures deeper than 1.5 cm below the surface.Recent studies addressing the use of conventional grey-scale (B-mode) ultrasonography (US) in the evaluation of RA synovial inflammation and joint damage indicate that clinical joint examination and CR are comparatively insensitive tools [].Evaluation of disease activity and structural damage to joints in rheumatoid arthritis (RA) is essential in both routine clinical management and clinical trials.These limitations include the use of ionising radiation and projectional superimposition, which can obscure erosions and mimic cartilage loss as an inevitable consequence of representing a three-dimensional structure in only two planes.CR offers only late signs of preceding disease activity and the resulting cartilage and bone destruction.

Datum: 14.03.2013 | Sichtbarmachung: 3490

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