Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy , valve prosthesis . Right perihilar , basilar opacity has improved . Stable left perihilar opacity , left basilar consolidation . Mildly improved right pleural effusion . Stable left pleural effusion . Increased heart size , pulmonary vascularity , stable .
    OUTPUT:
    
Interval mild improvement .