Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously visualized right apical pneumothorax is not appreciated on today 's radiograph . Multiple right - sided rib fractures are noted , but better visualized on prior CT . Slightly more prominent opacification of the right lung base , likely related to atelectasis . Small right pleural effusion unchanged . Cardiomediastinal silhouette within normal limits .
    OUTPUT:
    
Interval resolution of tiny right apical pneumothorax .