Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest . The heart is mildly enlarged , similar to prior . Cardiomediastinal contours are stable . Small blunting of the right costophrenic angle may represent a small pleural effusion or scarring . Previously described 4 mm nodular density at the right apex is obscured by an external lead . No pneumothorax or focal consolidation . No radiopaque foreign body .
    OUTPUT:
    
1 . Blunting of the right costophrenic angle is similar to prior and may represent small effusion vs scarring . 2 . Previously described 4 mm right apical nodular density is obscured by an external lead . As before , chest CT should be considered for further evaluation . 3 . No pneumothorax .