Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung fields are more inflated with subtle improvement of right lung opacity , in particular in the right upper lobe . The left base opacification are stable . Cardiac size is persistently enlarged .
    OUTPUT:
    
Improved ventilation with mild reduced opacification of the right lung , especially in the RUL . Persistent cardiomegaly .