Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant interval change with moderate right - sided pleural effusion and extensive opacification of the right lung . Mild cardiomegaly with prior sternotomy and CABG . Similar position of the pacemaker leads . The left lung is clear .
    OUTPUT:
    
Chronic right - sided effusion and widespread opacification , is stable since ___ can be fibrosis . No acute abnormality within the thorax .