Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single frontal portable radiograph of the chest was acquired . There is a generalized increase in the interstitial markings , as seen on the prior radiograph from ___ , likely mild interstitial edema . Heterogeneous bibasilar opacities could be atelectasis or infection . Moderate cardiomegaly is increased . The mediastinal contours are normal . Small bilateral pleural effusions may be present . There is no pneumothorax .
    OUTPUT:
    
1 . Mild pulmonary edema . 2 . Heterogeneous bibasilar opacities could be atelectasis versus infection . Clinical correlation recommended .