What is the proper technique for obtaining standard three‑view X‑ray images of the shoulder joint?

Standard Three-View Shoulder X-Ray Technique

For shoulder radiography, obtain at minimum three views: anteroposterior (AP) projections in internal and external rotation, plus either an axillary or scapular Y-view, with at least two views being orthogonal to each other. 1

Essential Technical Components

The Three Standard Views

1. Grashey Projection (True AP of Glenohumeral Joint)

• Turn the patient into a 30° posterior oblique position
• This profiles the glenohumeral joint by positioning it AP to the scapula rather than the body
• Critical for assessing the joint space accurately 2

2. AP Views with Humeral Rotation

• Obtain AP projections with the humerus in both internal and external rotation
• These can be straight AP projections or combined with the Grashey positioning
• Essential for evaluating different aspects of the humeral head and detecting Hill-Sachs lesions 1

3. Axillary Lateral View OR Scapular Y-View

• Both provide orthogonal imaging, but each has distinct advantages:
  • Axillary view: Superior for detecting glenohumeral and acromioclavicular dislocations that can be missed on AP views alone 1
  • Scapular Y-view: Preferred when patient has acute pain or recent dislocation, as the positioning is less painful and easier to obtain 2, 3

Critical caveat: Dislocations are frequently misclassified on AP views alone—the third orthogonal view (axillary or Y-view) is not optional 1

Patient Positioning Considerations

Perform radiographs upright whenever possible, as shoulder malalignment can be underrepresented on supine radiography 1. This is particularly important for trauma cases where subtle subluxations may be missed.

When to Choose Scapular Y Over Axillary View

The scapular Y-view is preferable when:

• Patient has just dislocated the shoulder (axillary positioning may be too painful)
• Shoulder has just been reduced (axillary positioning risks redislocation)
• Patient cannot tolerate the arm positioning required for axillary view 2

Studies show 81% of patients prefer the scapular Y-view due to less pain, and it provides accurate diagnosis in 92% of cases compared to axillary views 3.

Additional Specialized Views (When Indicated)

While not part of the standard three-view series, these may be added based on clinical suspicion:

• Stryker notch view: For Hill-Sachs deformities (arm externally rotated and abducted, beam angled 10° cephalad) 2, 4
• Westpoint view: For bony Bankart lesions (prone, shoulder on cushion, arm abducted 90°) 2
• Bernageau view: For quantifying glenoid or humeral head bone loss 1

Common Pitfalls to Avoid

1. Never rely on AP views alone—up to 8% of dislocations are missed without the orthogonal view 3
2. Avoid the transthoracic view—it offers little diagnostic value in modern practice 2
3. Don't force axillary positioning in acute trauma—use scapular Y-view instead to prevent patient discomfort and potential redislocation 2
4. Ensure true orthogonal views—the protocol requires at least two views that are perpendicular to each other 2

This standardized approach provides comprehensive evaluation of bony anatomy, joint alignment, and fracture detection—the primary concerns in shoulder imaging 1.