Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prior median sternotomy and mitral valve repair . No pulmonary edema . Asymmetric nodular opacity in the superior segment of the right lower lobe is again demonstrated , may reflect pulmonary infarct given the extensive pulmonary embolism . Small right - sided pleural effusion . Moderate cardiomegaly . No pneumothorax .
    OUTPUT:
    
No pulmonary edema . Asymmetric right lower lobe superior segment opacity can be pulmonary infarct .