Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs . There is mild cardiomegaly as well as trace bilateral effusions within the fissures . There is minimal pulmonary edema as evidenced by interlobular septal thickening , particularly in the left lower lobe . There is no pneumothorax .
    OUTPUT:
    
Interstitial pulmonary edema .