Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly with interval increase in bibasilar atelectasis . There is a possible right pleural effusion . The differential could include elevation of the right hemidiaphragm laterally . Mild upper zone redistribution , without overt CHF . No pneumothorax .
    OUTPUT:
    
1 . Bibasilar atelectasis . Early pneumonic infiltrate would be difficult to exclude . 2 . Equivocal small right effusion versus tenting of the hemidiaphragm . 3 . If clinically indicated , a lateral view may help to more completely assess for an underlying pneumonic infiltrate and effusion .