Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly is increased compared to the previous exam . Mediastinal contours are unchanged . Worsening diffuse interstitial opacities with associated ground - glass opacities in predominantly the perihilar and bibasilar regions are seen , with new bilateral small pleural effusions . More focal opacification in the retrocardiac region also is present . There is no pneumothorax . No acute osseous abnormalities are seen .
    OUTPUT:
    
Worsening diffuse interstitial opacities with new small bilateral pleural effusions and increased cardiomegaly likely reflect superimposed mild to moderate pulmonary edema on a background of known interstitial lung disease which previously was possibly attributable to drug reaction , COPD or vasculitis . More focal opacification in the left lung base is concerning for infection or aspiration .