Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The cardiac , mediastinal , and hilar contours appear unchanged including mild cardiomegaly and tortuosity of the thoracic aorta . There are new suspected trace pleural effusions , larger on the right than left , but no pulmonary edema or focal opacification . Mild background interstitial process appears decreased since the prior radiographs .
    OUTPUT:
    
No evidence of pneumonia or pulmonary edema . Trace suspected pleural effusions .