Chest-PA is a type of X-ray examination that provides a frontal view of the chest. It is used to assess the structures and organs within the chest, including the lungs, heart, ribs, and diaphragm. The PA (posteroanterior) positioning means that the X-ray beam passes from the back of the patient through the chest to the front, producing an image that is viewed as if the patient is standing facing the X-ray machine. This imaging technique can help detect various conditions such as pneumonia, lung tumors, fractures, and heart abnormalities. It is a common screening tool for evaluating respiratory and cardiac health.