Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right upper lobe peripheral opacity slightly improved since the prior . Moderate right - sided pleural effusion has increased . Small left - sided pleural effusion is stable . Moderate cardiomegaly with prior median sternotomy , CABG and mitral annular calcifications .
    OUTPUT:
    
Increasing moderate right - sided pleural effusion . Right upper lobe peripheral opacity has marginally improved .