Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild interstitial pulmonary edema , which has slightly improved from ___ . There is otherwise no focal consolidation . No pleural effusion or pneumothorax . Stable cardiomegaly . Median sternotomy wires are intact .
    OUTPUT:
    
Mild interstitial pulmonary edema , improved from ___ .