Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest radiograph ___ at 08 :06 is submitted .
    OUTPUT:
    
The pulmonary edema has improved but there is stable right basilar and increasing retrocardiac opacities concerning for worsening aspiration or pneumonia , less likely atelectasis . There is still likely residual mild interstitial edema , however . The heart remains enlarged . Mediastinal contours are stable . No obvious pneumothorax .