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RadiologyPHOTO INSERT P-11 Normal PA CXR. The convex right cardiac border is formed by the right atrium(straight arrows), and the curved arrows indicated the location of the superior vena cava.The left cardiac and great vessels border what might be considered as four skiing moguls.From cephalad to caudad, the moguls are the aortic arch, the main and left pulmonary arteries,the left atrial appendage, and the left ventricle. (Radiology 101, 3rd ed, 2009.)2 Normal lateral CXR. (Radiology 101, 3rd ed, 2009.)3 COPD: with hyperlucent, overinflated lungs and flat diaphragms. (Radiology 101, 3rd ed, 2009.)