Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP semiupright chest radiograph was obtained . The lungs are low in volume giving the appearance of bronchovascular crowding with bibasilar atelectasis . Despite this , interstitial abnormality suggests the presence of mild pulmonary edema . Assessment for effusions is limited as the left and a small portion of the right base are excluded from view though no large effusion is present . Mild cardiomegaly with tortuous aortic contour .
    OUTPUT:
    
Perhaps mild pulmonary edema .