Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral predominantly perihilar and basilar opacities likely reflect new mild pulmonary edema since ___ , likely due to acute CHF . Small amount of perifissural fluid is seen in the right lung . The heart size is unchanged . No pneumothorax .
    OUTPUT:
    
1 . New mild pulmonary edema due to acute CHF since ___ .