Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are within normal limits . Pulmonary vascularity is not engorged . Minimal linear opacity within the left lower lobe likely reflects subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized .
    OUTPUT:
    
Subsegmental atelectasis in the left lower lobe . No evidence of congestive heart failure or pneumonia .