Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . Previous layering effusions appear smaller possibly due to redistribution in upright positioning . There is mild right infrahilar opacity . The heart is moderately enlarged . Left chest wall pacer defibrillator leads are in stable position . There is no pneumothorax .
    OUTPUT:
    
1 . Minimal right infrahilar opacity similar to prior studies . Pneumonia can not be excluded in the appropriate clinical setting . 2 . Prior layering pleural effusions appear smaller possibly redistributed due to upright positioning .