Sonography of the foot and ankle.

Sonography of the foot and ankle is a quick, relatively inexpensive imaging modality that can be used to diagnose a variety of pathologic conditions. Sonography is particularly well suited for the assessment of tendons, soft-tissue masses, and suspected foreign bodies. Visualization of internal structural detail typically equals or exceeds that of MR imaging. Diagnostic accuracy, however, requires meticulous attention to technical parameters and proficiency with the transducer.