Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest ___ at 14 :31 is submitted .
    OUTPUT:
    
Stable cardiac enlargement . There has been interval development of mild interstitial edema . Subtle patchy opacities at both bases likely reflect patchy atelectasis rather than aspiration or pneumonia . Clinical correlation is recommended . No pneumothorax . Previously reported 6 mm nodular opacity in the right mid lung is not well appreciated on the current study .