Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There are interstitial opacities and Kerley B lines at the bases consistent with mild interstitial edema . No evidence of pneumonia . There is no pleural effusion or pneumothorax . Cardiac , mediastinal , and hilar contours are normal .
    OUTPUT:
    
Mild interstitial edema . No evidence of pneumonia .