Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . There is mild pulmonary vascular congestion , otherwise the hilar and mediastinal contours are unremarkable . Small bilateral pleural effusions are new . Right middle lobe atelectasis is unchanged compared to the prior CT from ___ . An opacity is seen in the retrocardiac region . There is no evidence of a pneumothorax . The visualized osseous structures are unremarkable . Abdominal aortic stent graft is re - demonstrated .
    OUTPUT:
    
1 . Patchy bibasilar opacities , which could be due to clinically suspected aspiration , although the appearance overlaps with atelectasis and infectious pneumonia . 2 . Complete right middle lobe collapse . 3 . New , small bilateral pleural effusions .