Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right central venous catheter terminates in the right atrium . Left pectoral pacemaker and its leads are in unchanged position . Sternotomy wires are intact . Mild bibasilar opacities are likely atelectasis in setting of low lung volumes . Enlarged pulmonary vessels are slightly larger compared to ___ . Mildly enlarged cardiac silhouette is similar to before . Trachea is mildly deviated to the left with luminal narrowing , similar to ___ .
    OUTPUT:
    
1 . Slightly increased pulmonary vascular congestion compared to ___ . 2 . Trachea is mildly deviated to the left with luminal narrowing , similar to ___ but increased compared to ___ . Possible etiologies may include enlarged thyroid or other mass .