Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size appears top normal . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is normal . Patchy opacity within the left lung base may reflect an area of developing infection . Minimal atelectasis is also noted in the right lung base . No pneumothorax or pleural effusion is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Patchy left basilar opacity may reflect developing infection in the correct clinical setting .