Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral diffuse prominent interstitial markings , perivascular cuffing and cephalization consistent with mild pulmonary edema . No pleural effusion or pneumothorax . The mediastinal contours are normal . There is mild cardiomegaly , stable since ___ .
    OUTPUT:
    
Mild pulmonary edema , slightly increased since ___ . Stable mild cardiomegaly .