For a lateral projection of the scapula, which condition is necessary for accurate imaging?

For a lateral projection of the scapula, which condition is necessary for accurate imaging?

• A. Spine of scapula parallel to film
• B. Unaffected arm raised across chest
• C. Central ray centered to the scapular vertebral border
• D. Patient breathes shallowly during exposure

Answer: (C)

For a true lateral scapula image you must align the beam with the scapula’s center so the anatomy is captured without distortion. Center the central ray to the scapular vertebral border (the medial border) so the beam passes through the middle of the scapula and the image shows the scapular body in profile without excessive overlap from surrounding structures. This precise centering produces a clear, accurate lateral view of the scapula and glenoid. Breathing and arm position can help optimize visibility, but they are secondary to ensuring the central ray hits the medial scapular border. Centering elsewhere can cause foreshortening, clipping, or misrepresentation of the scapular anatomy.

For a true lateral scapula image you must align the beam with the scapula’s center so the anatomy is captured without distortion. Center the central ray to the scapular vertebral border (the medial border) so the beam passes through the middle of the scapula and the image shows the scapular body in profile without excessive overlap from surrounding structures. This precise centering produces a clear, accurate lateral view of the scapula and glenoid.

Breathing and arm position can help optimize visibility, but they are secondary to ensuring the central ray hits the medial scapular border. Centering elsewhere can cause foreshortening, clipping, or misrepresentation of the scapular anatomy.