Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large dual - lumen left - sided central venous catheter is seen terminating at the cavoatrial junction / right atrium . There are relatively low lung volumes . Left base opacity may relate to atelectasis , although underlying consolidation is not excluded . Additionally , there a couple subtle small patchy opacities in the right mid - to - lower lung and infectious process is not excluded . No large pleural effusion is seen ; however , trace pleural effusions would be difficult to exclude . The cardiac silhouette is mildly enlarged . There is mild prominence of the main pulmonary artery . The aorta is calcified and tortuous . Partially imaged right humeral prosthesis is noted .
    OUTPUT:
    
Low lung volumes . Patchy left base retrocardiac opacity may be due to atelectasis , although underlying consolidation is not excluded in the appropriate clinical setting . Additionally , two small subtle patchy areas of opacity in the right mid and lower lung could also be due to infection . Prior studies are not currently available for comparison on PACS .