Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . There is minimal atelectasis at the lung bases , but no focal consolidation . No pleural effusion or pneumothorax is visualized . No acute osseous abnormalities are seen . The pulmonary vascularity is not engorged .
    OUTPUT:
    
Minimal atelectasis at the lung bases but no definite evidence for pneumonia or congestive heart failure .