Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is borderline enlarged . The mediastinal and hilar contours are normal . Pulmonary vasculature is not engorged . Patchy left basilar opacity may reflect atelectasis , but infection can not be completely excluded . No pleural effusion , focal consolidation , or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
Low lung volumes with minimal patchy left basilar opacity which may reflect atelectasis . Infection however is not excluded in the correct clinical setting .