==Evaluation==
[[File:Subacromial space on outlet view X-ray.jpg|thumb|Supraspinatus outlet view X-ray, showing subacromial space measurement, and an acromial spur(above the arrow).]]
* Measurement of the '''subacromial space'''. This is normally in shoulder radiographs is 9–10 mm; this space is significantly greater in men, with a slight reduction with age.<ref name=petersson1984/> In middle age, a subacromial space less than 6 mm is pathological.<ref name=petersson1984>{{cite journal|author=Claes J. Petersson & lnga Redlund- Johnell|pmid=6702430|title=The subacromial space in normal shoulder radiographs|journal=Acta Orthop Scanda |year=1984| volume=55 |issue=1 |pages=57–8}}</ref>
* Presence of any '''acromial spur'''