Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has been extubated . The patient is status post coronary artery bypass graft surgery . A right internal jugular central venous catheter terminates at the cavoatrial junction . The cardiac , mediastinal and hilar contours are stable . There is a moderate to large pleural effusion on the right , possibly increased in size , although a confounding factor is different positioning , so it is difficult to be certain as to whether there has been any real change . There is probably a small pleural effusion on the left . More conspicuous is retrocardiac opacification obscuring the left hemidiaphragm , a typical appearance for atelectasis although not specific .
    OUTPUT:
    
Moderate right - sided pleural effusion , increasing retrocardiac opacification , not specific but most commonly due to atelectasis .