Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased density within the right mid and lower lung which could reflect aspiration or pneumonia in the appropriate clinical circumstance . Relative linear opacity in the left lower lung may represent atelectasis . There is no pulmonary vascular congestion , overt edema , or large pleural effusions . There is no pneumothorax . Cardiomediastinal and hilar contours are within normal limits and unchanged from prior .
    OUTPUT:
    
Increased density in the right lung base may reflect aspiration or pneumonia in appropriate clinical circumstance .