Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Focus of air noted behind the heart on the lateral view raises the possibility of pneumomediastinum . The cardiomediastinal contours are otherwise normal . No focal consolidation , pleural effusion or pneumothorax is identified .
    OUTPUT:
    
Focus of air noted behind the heart on the lateral view raises the possibility of pneumomediastinum , which can be due to acute bronchospasm , although no signs suggestive of such in this CXR . Important to consider if history of esophageal trauma . ED QA nurse emailed with final , revised findings on ___ .