Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable view of the chest demonstrates no evidence of pneumomediastinum . There is slight blunting of the right costophrenic angle which may represent a small effusion or pleural thickening . The lungs are grossly clear . The cardiomediastinal hilar contours are stable . There is no pneumothorax .
    OUTPUT:
    
No evidence of pneumomediastinum . Possible small right pleural effusion .