Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , lung volumes are lower , causing crowding of bronchovascular structures . Bibasilar atelectasis is identified . No focal consolidation . Cardiomediastinal and hilar silhouettes are unchanged . No free intraperitoneal air .
    OUTPUT:
    
1 . Bibasilar atelectasis . No focal consolidation . 2 . No evidence of free intraperitoneal air .