Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study is somewhat limited due to rotation . The patient is status post median sternotomy . A tracheostomy tube tip terminates in unchanged position . There is moderate cardiomegaly . The aorta is mildly tortuous . Previously noted large right pleural effusion has slightly decreased in size compared to the previous exam . Small left pleural effusion is also likely present . Bibasilar airspace opacities likely reflect atelectasis . Infection can not be excluded . Mild pulmonary vascular congestion is noted . There is no pneumothorax .
    OUTPUT:
    
1 . Slight interval decrease in size of moderate to large right pleural effusion . Probable trace left pleural effusion . 2 . Bibasilar airspace opacities likely reflect atelectasis though infection can not be excluded . 3 . Mild pulmonary vascular congestion .