Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy . A dialysis line through the subclavian approach terminates in the right atrium . The heart size is again mildly enlarged . Previous pulmonary edema from ___ has improved . A left - sided pleural effusion as well as a probable right - sided pleural effusion is present on today 's exam . The aortic knob is calcified .
    OUTPUT:
    
Bilateral small pleural effusions . Mild pulmonary edema , improved since ___ .