Ultrasonography (US) is an imaging modality which application is rapidly growing. It has a number of advantages over other advanced imaging techniques such as magnetic resonance imaging (MRI), including low cost, good accessibility, and ability to scan many joints in a short period of time. However, the additional benefit of using this modality in terms of patient outcomes has not been demonstrated. Thus, clarification is needed if the use of US leads to better care for RA patients.