[Evolution of musculoskeletal ultrasonography]

Sonography is a safe, inexpensive and readily accessible technique which has acquired a major place in musculoskeletal imaging over the past two decades. Thanks to recent technical innovations such as high-definition multifrequency probes, compound effect, use of harmonic frequencies, power Doppler, and extended field of view, today's sonographic images are extremely precise. At the same time, based on magnetic resonance imaging (MRI) and computed tomography (CT) acquisitions, the sonographic anatomy has become broader and more detailed, and the sonographic semiology is more precise and reliable. In this article the authors evaluate current uses of diagnostic and interventional sonography in musculoskeletal disorders.