Which projection would require less rotation of the hand for visualization of the distal phalanges?

The posteroanterior projection is designed to minimize the rotation of the hand while effectively visualizing the distal phalanges. In this position, the x-ray beam enters from the posterior side of the hand and exits through the anterior side, allowing for a clearer view of the phalanges with less oblique positioning.

This method maintains a more natural alignment of the fingers, which is crucial for obtaining an accurate representation of the anatomy, particularly in the distal phalanges where anatomical details are finer and may require less distortion for precise imaging.

Other projections typically require varying degrees of hand rotation or positioning that can obscure or distort the appearance of the phalanges compared to the posteroanterior approach. For instance, the lateral projection would require the hand to be turned to the side, potentially leading to overlaps of the distal phalanges and making it harder to visualize them distinctly.