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To read a chest x-ray, start by looking for markers on it, like "l" for left, "r" for right, "pa" for posteroanterior, and "ap" for anteroposterior, to identify the positioning of the x-ray. then, find the airway on the x-ray and check to see if it's patent and midline. One of those is a chest x-ray. it uses a small amount of radiation to produce an image of your heart, lungs, and blood vessels. your doctor uses a chest x-ray to: look at your chest bones, heart. A chest x-ray is one method of providing your doctor with images of your heart and lungs. a computed tomography (ct) scan of the chest is another tool that is commonly ordered in people with. Chest x-ray. a chest x-ray helps detect problems with your heart and lungs. the chest x-ray on the left is normal. the image on the right shows a mass in the right lung. Chestx-rays mayo clinic. health details: chest x-rays produce images of your heart, lungs, blood vessels, airways, and the bon...