Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A central venous catheter again terminates in the right atrium , passing through a left brachiocephalic stent , as before . The patient is also status post right shoulder replacement , as before . The cardiac , mediastinal and hilar contours appear unchanged including tortuosity and calcification along the aorta and a left ventricular configuration to the cardiac contour . The lung volumes are low , with streaky basilar opacities , which are more extensive in the left retrocardiac region than right and probably attributable to atelectasis . Pleural effusions and pneumonia are not completely excluded , however . There is no evidence for pneumothorax .
    OUTPUT:
    
Low lung volumes with patchy basilar opacities , greater on the left than right , probably attributable to atelectasis , but not entirely specific . If pulmonary symptoms are present or other concern for pneumonia , than when clinically appropriate , short - term followup chest radiographs , preferably with standard PA and lateral technique if possible , could be considered .