Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A diffuse right lung opacity , representing a combination of atelectasis and effusion , is unchanged in comparison to the ___ examination . A previously seen focal opacity within the left mid lung zone is less apparent on the current examination . A small left pleural fusion is unchanged . There is mild left pulmonary edema . There is no pneumothorax .
    OUTPUT:
    
1 . Mild left pulmonary edema . Trace left pleural effusion . 2 . Unchanged complete opacification of the right lung , representing at combination of atelectasis and effusion .