Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes cause bronchovascular crowding and bibasilar atelectasis . Small lung nodules consistent with metastasis are better seen on prior CT . There is probably mild vascular congestion . If any there are small bilateral pleural effusions . Bibasilar airspace opacities best appreciated on the lateral view represent atelectasis . The cardiomediastinal silhouette is stable with moderate cardiomegaly and tortuous aorta .
    OUTPUT:
    
1 . Low lung volumes . 2 . Bibasilar airspace opacities likely represent atelectasis , less likely pneumonia , depending upon the clinical circumstances 3 . Minimal vascular congestion 4 . Small lung nodules are better seen on prior CT consistent with metastasis