Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate low lung volumes which results in bronchovascular crowding . There is increased opacification at the bilateral bases which likely represents atelectasis , however pneumonia could be considered in the appropriate clinical setting . There is no pneumothorax or pleural effusion . The cardiomediastinal and hilar contours are unchanged .
    OUTPUT:
    
Increased opacification of the bilateral bases likely represents atelectasis , however pneumonia could be considered in the appropriate clinical setting .