Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of cardiac silhouette is re - demonstrated . There is mild tortuosity of the thoracic aorta with calcification of the aortic knob . A right brachiocephalic venous stent is again demonstrated with distal aspect of the stent terminating in the upper SVC . There is no pulmonary vascular congestion . Interstitial opacities within the upper lobes persist but are slightly less apparent , and on the prior chest CT were thought to reflect an infectious process . Additionally streaky bibasilar airspace opacities likely reflect atelectasis . No pleural effusion or pneumothorax is seen . No acute osseous abnormalities detected .
    OUTPUT:
    
Persistent interstitial opacities in both upper lobes , less pronounced than on the prior radiograph , and thought on the prior chest CT to reflect a small airways infectious process . Minimal bibasilar atelectasis .