Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small increased density in right lower lung is due to overlying pleural effusion . The pleural effusion is underestimated on this AP view and is new since CT torso of ___ . Severe emphysema is more prominent in upper lobe . Mediastinal and cardiac contours are top normal . There is no pneumothorax .
    OUTPUT:
    
Small right pleural effusion is new since ___ . The pleural effusion is underestimated on this chest x-ray compared to today 's MRI .