Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The cardiac silhouette is top - normal . Rounded retrocardiac opacity with focus of air within likely relates to a hiatal hernia . No pulmonary edema .
    OUTPUT:
    
No acute cardiopulmonary process . Likely hiatal hernia .