Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy wires are intact . The heart is mildly enlarged . Mediastinal silhouette is unremarkable . No pulmonary edema is noted . There is increased opacity in the right posterior lung base which could represent pneumonia or aspiration . Focal scarring in the right upper lobe and lingula are unchanged . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
1 . Mild cardiomegaly without evidence of CHF . 2 . Increased opacity in the right posterior lung base may represent aspiration or an early pneumonia . Follow - up radiographs may be helpful in this regard .