Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large hiatal hernia , grossly unchanged in size from the prior exam . No focal opacities concerning for an infectious process are noted . There is mild right basilar atelectasis . Overlying soft tissue and degenerative changes makes it difficult to evaluate for rib fractures , though there are no obvious rib fractures identified . Heart size is top normal . Mediastinal and hilar contours are unchanged . Mild loss of height of several mid and lower thoracic vertebral bodies is unchanged . No pneumothorax or pleural effusion .
    OUTPUT:
    
No obvious rib fracture ; if clinical concern is high , a dedicated rib series can be obtained . Large hiatal hernia . Mild right atelectasis .