Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left chest wall biventricular AICD is present . No focal consolidation , pleural effusion or pneumothorax identified . There is mild vascular congestion as well as thickened interstitial ( ___ B ) lines . The size of the cardiac silhouette is enlarged but unchanged .
    OUTPUT:
    
Mild pulmonary vascular congestion and thickened interstitium , consistent with pulmonary interstitial edema .