Presentation
Shoulder pain.
Patient Data
Age: 30 years
From the case:
Acromion index
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The acromion index (AI) is a measurement done in assessing the shoulder on an AP radiograph and is obtained as the ratio between the
GA: distance from the glenoid cavity to the lateral edge of the acromion and
GU: distance from the glenoid cavity to the lateral edge of the humerus
AI= GA/GU
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