- Recommended views include AP, 15 degree cephalic tilt and axial views.
- Specific acromio-clavicular (AC) joint views should be specified as the exposure is different from shoulder views.
- In the normal patient, the inferior surfaces of the acromion and clavicle are aligned.
- Grade I injury is radiographically normal. Grade II injury shows widening of the joint with upward displacement of the clavicle. Grade III injury has a widened coraco-clavicular space ( 13 mm or a difference of 5 mm between the two sides) and complete disruption of the AC joint (should be 8 mm).
- Stress views were commonly requested but cannot be recommended due to the discomfort caused and the high rate of false negatives seen from muscular spasm.
 |
| Acromio-clavicular joint dislocation. |