Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are normal . Mild cardiomegaly which is stable . Normal hilar and mediastinal structures . No pneumonia , no pulmonary edema . No pleural effusions . Status post CABG with aligned median sternotomy wires and normal location of surgical clips . Status post right lung surgery with surgical material seen .
    OUTPUT:
    
Mild cardiomegaly . No evidence of pneumonia .