Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear . The patient is status post median sternotomy as well as pacemaker placement with a single lead terminating in the left ventricle . Cardiac size is within normal limits . Aortic calcifications are noted at the knob . No pleural effusions or pulmonary edema .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .