Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded with possible atelectasis and mild bronchial wall thickening at the lung bases . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Minimal atelectasis and possible minimal bronchial wall thickening at the lung bases possibly reflecting bronchitis . No evidence of pneumonia .