Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable chest radiograph demonstrates stable mild - to - moderate cardiomegaly with unremarkable mediastinal and hilar contours . Bibasilar atelectasis is identified . Possibly trace bilateral pleural effusions are unchanged . No focal opacifications identified .
    OUTPUT:
    
Trace bilateral pleural effusions . No opacification concerning for pneumonia . No overt pulmonary edema .