Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pacer unit projects over the left chest with leads in the right atrium and right ventricle . Sternotomy wires and mediastinal clips are unchanged . The heart size is at the upper limits of normal . The mediastinal contours demonstrate calcified atherosclerotic disease of the aortic knob with a mildly tortuous aorta . The previously described pulmonary edema has resolved . Pleuroparenchymal scarring , and possible pleural calcification , at the left base is longstanding , but there is no pleural effusion or pneumothorax . Degenerative changes are noted in the thoracic spine , primarily in the form of anterior osteophytes .
    OUTPUT:
    
No acute cardiopulmonary process .