Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is stable . However , in comparison to the prior study there is interval development of diffuse bilateral interstitial opacities with perihilar predominance and small bilateral pleural effusions . There is an area of more confluent opacification at the right base . No pneumothorax .
    OUTPUT:
    
Interval development of diffuse bilateral interstitial opacities and small bilateral pleural effusions , consistent with mild pulmonary interstitial edema .