Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is moderately enlarged , similar compared to the prior study . Mediastinal contours are unchanged . Mild interstitial pulmonary edema is not substantially changed in the interval , and hilar contours are similar . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild interstitial pulmonary edema , not changed in the interval .