Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Minimal patchy opacity is noted in the left lung base , with the remainder of the lungs appearing clear of focal consolidation . No pleural effusion or pneumothorax is demonstrated . No acute osseous abnormalities seen .
    OUTPUT:
    
Minimal patchy left basilar opacity which could reflect atelectasis but infection can not be completely excluded in the correct clinical setting .