Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are reduced . Heart size is borderline enlarged . The mediastinal contour is unremarkable . There is crowding of the bronchovascular structures with mild pulmonary vascular congestion . Minimal patchy opacities within both lung bases are nonspecific and could reflect infection , aspiration or atelectasis . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion . 2 . Minimal patchy bibasilar airspace opacities , improved compared to the prior study , but could reflect atelectasis , infection or aspiration .