Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is diffuse increased interstitial markings , most consistent with mild pulmonary edema . At the right base , there is an ill - defined opacity , which may be related the edema , though a superimposed infection is difficult to exclude . There are small bilateral pleural effusions . There is no pneumothorax . The mediastinal contours are normal . The heart is mildly enlarged , and unchanged from the prior exam .
    OUTPUT:
    
1 . Mild pulmonary edema . 2 . More focal opacity at the right base may be related to the edema , though an infection can not be excluded in the proper clinical setting . 3 . Small bilateral pleural effusions . 4 . Mild cardiomegaly .