Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size remains mildly enlarged but unchanged . The mediastinal contours are similar . Low lung volumes results in crowding of the bronchovascular structures with mild pulmonary vascular congestion . No frank pulmonary edema is present . Patchy bibasilar airspace opacities likely reflect atelectasis . No pneumothorax or pleural effusion is noted . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis and mild pulmonary vascular congestion .