Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs again demonstrate a right pleural drain in place and the expected postoperative appearance of the mediastinum . Moderate cardiomegaly is unchanged . A small right lower lung opacity likely represents atelectasis , but should continue to be monitored . There are small bilateral pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
1 . Right lower lobe opacity which likely represents atelectasis , but should continue to be monitored . 2 . Bilateral small pleural effusions . 3 . Normal postoperative appearance of the mediastinum .