Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild increase in bilateral interstitial markings suggestive of mild increase in central venous pressure . The cardiomediastinal silhouette appears stable to minimally enlarged in comparison to prior study . The aorta appears tortuous . Otherwise , the lungs are clear and without a focal consolidation , effusion , or pneumothorax .
    OUTPUT:
    
Mild interstitial edema .