Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided pleural effusion has minimally decreased when compared to the prior . Peripheral right upper lobe airspace opacity has substantially increased in size and density . The left lung remains clear . Moderate cardiomegaly with dystrophic calcifications of the mitral annulus . Median sternotomy wires and CABG are stable .
    OUTPUT:
    
Minimal decrease in right pleural effusion Enlarging peripheral right upper lobe opacity . Differential diagnosis includes progressive pulmonary infection , infection complicated by organizing pneumonia , and pulmonary infarction .