Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a left - sided dialysis catheter with the tip terminating in the right atrium . Mild cardiomegaly is overall stable compared to the prior exam . Again noted is a brachiocephalic venous stent , overall unchanged in position compared to the prior exam . Linear opacities in the retrocardiac region are likely secondary to atelectasis . There appears to be a small left pleural effusion . There is diffuse mild pulmonary edema . This is no evidence of pneumothorax . Visualized osseous structures are unremarkable .
    OUTPUT:
    
Diffuse mild pulmonary edema . Linear opacities in the retrocardiac region likely secondary to atelectasis . Small left pleural effusion .