Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . There is a subtle bilateral interstitial abnormality that is more prominent centrally than peripherally . There is also evidence of Kerley B lines along the lateral aspect of the right lower chest wall . There is no focal consolidation . Massive enlargement of the cardiac silhouette is not significantly changed . The mediastinal contours are unchanged . There are no definite pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
Findings most consistent with mild interstitial pulmonary edema . Of note , an atypical infectious process , particularly one that is viral in nature , could have a similar appearance .