Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are stable with moderate cardiomegaly and tortuous aorta . Mild pulmonary edema has improved . . There is no pneumothorax . Bilateral effusions are small . . There are moderate degenerative changes in the thoracic spine . Patient is status post CABG . Sternal wires are aligned
    OUTPUT:
    
Improved now mild pulmonary edema