Position: Chest PA
The chest PA projection is the standard frontal view used in radiography because it minimizes cardiac magnification and provides optimal lung visualization. The patient stands facing the detector with shoulders rolled forward to move the scapulae laterally. A 72 inch SID reduces geometric distortion and improves sharpness. This projection evaluates lung fields, heart size, mediastinum, and pleural spaces. It is foundational for ARRT competency and clinical practice.