Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior radiograph , moderate cardiomegaly is unchanged , and pulmonary edema has improved , now mild in severity . There is no pneumothorax or enlarging pleural effusions . Intact median sternotomy wires and mediastinal clips , post CABG .
    OUTPUT:
    
Persistent moderate cardiomegaly , with improved pulmonary edema , now mild in severity .