Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to 1 day earlier , the cardiomediastinal silhouette appears slightly smaller , though this is in part due to technical differences . Again seen is upper zone redistribution , without overt CHF . Hazy opacity at both lung bases is again noted , slightly less pronounced . Possible small right and very small left effusion , also appear slightly improved . Again seen is a catheter overlying the lower chest and upper abdomen , for which clinical correlation is requested . No pneumothorax , pneumomediastinum , or pneumo pericardium detected .
    OUTPUT:
    
1 . Mild vascular plethora similar to the prior study . Doubt overt CHF . 2 . Hazy opacity both lung bases slightly improved . Minimal blunting of right greater the left costophrenic angles , also slightly improved . 3 . Cardiac silhouette appears smaller on the current film .