When performing a PA chest, which topographical landmark will determine the proper centering level on the patient?
top of the shoulders
lower rib margin
inferior angle of scapula
vertebra prominens
inferior angle of scapula
Rationale: The thoracic vertebrae 7/8, which corresponds to the inferior angle of the scapula, determines the proper centering level on the patient. This landmark could be palpated before wrapping the arms around the upright Bucky to roll the shoulders forward and remove scapulae from the lung field.
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