Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Swan - Ganz ends in right main pulmonary artery . Sternotomy was done for CABG . Mild cardiac contour enlargement is unchanged . Minimal bibasilar atelectasis has increased . There is no sign of pulmonary edema . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Except for increased bibasilar atelectasis there is no significant change since the prior exam .