Figure 1.

B-mode ultrasonography and shear wave sonoelastography using acoustic radiation force impulse imaging of supraspinatus tendon in patient with right shoulder pain. (A) Longitudinal ultrasonography of the right shoulder showed full-thickness supraspinatus tendon tear (red arrows) and (B) the highest shear wave velocity of torn supraspinatus tendon in a selected region of interest (ROI) was 3.5 m/sec; (C) longitudinal ultrasonography of the left shoulder showed intact supraspinatus tendon and (D) the highest shear wave velocity of intact supraspinatus tendon in ROI was 9.7 m/sec. Shear wave velocity of the intact supraspinatus tendon was higher than that in full-thickness supraspinatus tendon tear. The slower velocity indicates less stiffness.