Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiographs provided . Underpenetration limits assessment . There is hilar congestion with mild interstitial pulmonary edema . No convincing evidence for pneumonia . The heart is mildly enlarged . Mediastinal contour is stable with calcified aorta . No large effusion or pneumothorax .
    OUTPUT:
    
Mild interstitial edema .