Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right IJ central add tip lies near the cavoatrial junction . No pneumothorax detected . Sternotomy wires and prosthetic valve again noted . The cardiomediastinal silhouette is enlarged , possibly slightly improved , given differences in positioning . There is platelike atelectasis in both mid zones . Although , on the right , this has a somewhat thickened appearance laterally , in no nodular opacit Y T is seen in this area on targeted review of the ___ chest CT . There is a small right effusion and atelectasis at the right lung base . Hazy density at the left costophrenic angle could reflect a tiny left effusion and there is minimal atelectasis at the left lung base . Mild vascular plethora , but doubt overt CHF .
    OUTPUT:
    
Cardiomegaly , bibasilar atelectasis , and small right and question small left pleural effusions . Mild vascular plethora , but doubt overt CHF .