Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest show different lung volumes , but lungs are probably clear . There is no pleural abnormality . Hilar and mediastinal silhouettes are unremarkable aside from heavily calcified aorta and top normal heart . There is no pulmonary edema . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .