Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are normal . Streaky left lung base opacity likely represents atelectasis . There is no other focal consolidation , pleural effusion or pneumothorax . No pulmonary edema . Mild cardiomegaly . No subdiaphragmatic free air . No acute osseous abnormalities identified .
    OUTPUT:
    
No acute cardiopulmonary process .