Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates mild cardiomegaly . Hilar contours are stable . There is no large pleural effusion . Streaky opacity at the left lung base is thought to reflect atelectasis . Emphysematous changes are noted . No focal opacity convincing for an infectious process is seen . There is no overt pulmonary edema .
    OUTPUT:
    
Stable cardiomediastinal silhouette with mild cardiomegaly . No pulmonary edema . Emphysema .