Fig. 2
From: Interobserver agreement on the sonographic severity grading of shoulder impingement syndrome
Left shoulder of the same female patient shown in Fig. 1, with Grade-3 impingement scanned by second observer. Acromion-to-greater tuberosity distance in neutral position was 19.9 mm while in abduction it was 18.0 mm. The ratio between abduction and neutral position of the acromion to greater tuberosity distance was 0.90. Acr Acromion, GtT Greater tuberosity, ABD Abduction, NEUT Neutral Position