Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are compared to previous exam from ___ . Again seen are small bibasilar effusions which have decreased in size compared to prior . Persistent retrocardiac opacity may represent a superimposed consolidation . Superiorly , the lungs are clear and there is no pulmonary vascular congestion . Cardiac silhouette is enlarged but stable . Coronary stents are identified . Triple - lead pacing device is again noted . Right - sided central catheter is identified with distal tip in the right atrium . Osseous and soft tissue structures are unchanged .
    OUTPUT:
    
Interval reduction in size of the bilateral effusions . Persistent retrocardiac opacity which could represent atelectasis or pneumonia in the proper clinical setting .