The use of ultrasound imaging by physical therapists is growing in popularity. This commentary has 2 aims. The first is to introduce the concept of rehabilitative ultrasound imaging (RUSI), provide a definition of the scope of this emerging tool in regard to the physical therapy profession, and describe how this relates to the larger field of medical ultrasound imaging. The second aim is to provide an overview of basic ultrasound imaging and instrumentation principles, including an understanding of the various modes and applications of the technology with respect to neuromusculoskeletal rehabilitation and in relation to other common imaging modalities.

J Orthop Sports Phys Ther. 2007:37(8):434-449; published online 30 May 2007. doi:10.2519/jospt.2007.2530

KEY WORDS: elastography, magnetic resonance imaging, rehabilitation, sonography