Role of extended field of view ultrasonography in musculoskeletal disorders

ABSTRACT

Real time ultrasound [U/S] scanning is useful to detect abnormalities of musculo-skeletal system [MSK] and shows the effect of movement. However, documentation is best with the extended field of view [Fov] ultrasonography. This new imaging technique identifies identical structures on two successive images for position registration to display a large area in real time without position sensors. To evaluate the usefulness of extended Fov U/S in displaying and documenting on a single, static image a more panoramic depiction of MSK abnormality and its relationship to adjacent structures. Abnormalities of tendons, muscles, and soft tissue infection and masses are examples of lesions documented by high frequency extended Fov U/S. The study was monitored for 24 months period and included 18 patients [7 males and 11 females] of variable age groups. Six patients with tendon pathology, three with muscle pathology, eight with soft tissue masses, and one with a bony lesion. Large resolution preserved composite images of up to 30 cm were obtained. The display of the relationship of abnormalities to surrounding structures is very important and allows for better interpretation of findings and appreciation of the diagnosis on a static image. In addition, easily useful applicable comparative measurements on follow up scanning were done. Extended Fov U/S allowed [a] better appreciation of MSK disorders [b] sizing of large masses on a single global image [c] relating the lesion to surrounding structures [d] greater measurement reproducibility at follow up scanning in circumstances under which conventional real time scans could not provide this information