Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . A left IJ access dialysis catheter is again noted with its tip in the low SVC or possibly at the cavoatrial junction . A stent is again noted within the left brachiocephalic vein . Lung volumes are markedly low with bibasilar atelectasis and bronchovascular crowding . Difficult to exclude a subtle underlying pneumonia . No convincing signs of edema . No large effusion or pneumothorax . Overall cardiomediastinal silhouette appears grossly unchanged . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Bibasilar atelectasis , difficult to exclude a subtle underlying pneumonia . Dialysis catheter in place .