Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires again noted . There is mild interstitial pulmonary edema . The heart remains top - normal in size . No large effusion , pneumothorax or signs of pneumonia . Mild degenerative spurring is seen in the thoracic spine anteriorly . Degenerative changes also partially imaged at the left shoulder .
    OUTPUT:
    
Top normal heart size with mild interstitial pulmonary edema .