Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate cardiomegaly is unchanged . Mediastinal contour is unremarkable . There is no focal lung consolidation , pleural effusion , or pneumothorax . There is increased interstitial markings bilaterally , consistent with mild interstitial edema .
    OUTPUT:
    
1 . No radiographic evidence of pneumonia . 2 . Mild interstitial edema .