Sonography reliably detects and quantifies supraspinatus tears. Both the Crass and the modified Crass positions reflected the true size of supraspinatus tears in the transverse plane. In the sagittal plane, the Crass position is the more useful to quantify supraspinatus tears because the modified Crass position overestimates the size of such tears.

Sonography is an effective imaging option in assessing spring ligament abnormalities in patients with symptomatic PTT dysfunction.

High-resolution ultrasound imaging is accurate for identification and measurement of normal lateral ulnar collateral ligaments. Therefore, ultrasound may prove valuable in assessment of abnormal lateral ulnar collateral ligaments.

High-resolution ultrasound can be used to identify and measure the thickness of the superomedial part of the normal spring ligament. The provided baseline measurements for the normal ligament could prove valuable when assessing the abnormal ligament.