Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is a stable . The aorta is tortuous . Mild interstitial edema has improved . The lungs are hyperinflated . There is no pneumothorax or pleural effusion . There are degenerative changes in the thoracic spine
    OUTPUT:
    
Improved mild interstitial edema