Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest film ___ at 23 :26 is submitted .
    OUTPUT:
    
There has been interval development of a prominent interstitial pattern , more on the right than the left , as well as more focal patchy opacities in the right upper and lower lung and in the retrocardiac region . Given the interval change , this would favor mild pulmonary and interstitial edema rather than an infectious process . There is possibly a small left effusion . Overall cardiac and mediastinal contours are stable . A nasogastric tube is seen coiled within the stomach . No pneumothorax .