Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left chest wall Port - A - Cath ends in the region of the cavoatrial junction . A tubular structure projecting over the right neck appears to represent a shunt and is unchanged in position . Lung volumes are low . There is a small right pleural effusion Linear opacities in the right lower lung likely reflects atelectasis . There is increased opacity in the right middle lobe which could reflect atelectasis though a superimposed infection is possible .
    OUTPUT:
    
Low lung volumes with small right pleural effusion and increased opacity in the right lower lung which may reflect atelectasis or pneumonia .