The AP oblique-bilateral hands projection ("ball-catcher's position") is performed to evaluate for early signs of:

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The AP oblique-bilateral hands projection, also known as the "ball-catcher's position," is useful in evaluating for early signs of rheumatoid arthritis. The position of the hands (palms facing down and fingers spread apart) helps to demonstrate joint space narrowing, erosions, and soft tissue swelling, which are all common signs of rheumatoid arthritis.

The AP Oblique-Bilateral Hands Projection ("Ball-Catcher's Position") Is Performed to Evaluate