Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs again demonstrate a large right pleural effusion with associated atelectasis , not significantly changed in the last hour , but increased compared to ___ and ___ . The left base infiltrate is improved compared to ___ . The right base infiltrate is obscured by the pleural effusion and can not be compared . There is no pneumothorax .
    OUTPUT:
    
1 . Increase in a large right pleural effusion since ___ , with associated atelectasis . 2 . Improved left base infiltrate compared to ___ . The previously seen right base infiltrate can not be compared due to overlying pleural effusion .