Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a residual small right pneumothorax and small right pleural effusion . Assessment for change is difficult given the differences in modalites , though no large change in the size is identified . An opacity at the right base likely represents atelectasis and has increased since the initial radiograph . Superimposed infection / aspiration is difficult to exclude . There is minimal left basilar atelectasis . The cardiomediastinal silhouette is normal . The known right rib fractures are better assessed on the prior CT .
    OUTPUT:
    
1 . Small right pneumothorax and small right pleural effusion . Assessment for change is difficult given the differences in modality , though no significant change is appreciated . 2 . Increasing right basilar consolidation , likely contusion and atelectasis . Superimposed infection or aspiration can not be completely excluded .