Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . Increasing bibasilar opacities , left greater than right may reflect atelectasis or infection . There is no pleural effusion or pneumothorax . There appears to be a tracheal Y stent , however this is not well visualized .
    OUTPUT:
    
Bibasilar opacities are increased from ___ particularly at the left base which may reflect atelectasis or infection in the appropriate clinical setting .