Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable single view of the chest shows interval increase of right lung base opacification likely due to increased pleural effusion and atelectasis . Right lung base pleural drain is unchanged since ___ . MInimal improvement of pulmonary edema . Exam is otherwise unchanged since prior , with unchanged position of the VP shunt , normal cardiomediastinal silhouette .
    OUTPUT:
    
Interval increase of right base opacification due to increase pleural effusion and atelectasis . Improved pulmonary edema .