Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is leaning to the right and the right sided lung volume is slightly low . There is mild upper zone redistribution , but I doubt overt CHF . There is minimal atelectasis in the right mid and lower zones . Possible trace subsegmental atelectasis the left base . No frank consolidation is identified . No gross effusion . No pneumothorax detected . Heart size is at the upper limits of normal . Cardiomediastinal silhouette is probably unchanged compared with ___ , allowing for technical differences .
    OUTPUT:
    
Bibasilar atelectasis and upper zone redistribution . No CHF or frank consolidation . No gross effusion .