Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy , CABG , and mitral valve replacement . The heart is mildly enlarged . The mediastinal contours are unchanged with calcification of the aortic knob again noted . Mild pulmonary edema appears progressed compared to the prior exam with small bilateral pleural effusions , also minimally increased compared to the prior exam . Left basilar opacification likely reflects atelectasis . There is no pneumothorax . No acute osseous abnormalities are identified .
    OUTPUT:
    
Slight interval worsening of mild pulmonary edema with small bilateral pleural effusions . Left basilar opacity likely reflects atelectasis .