Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has been intubated . The endotracheal tube terminates about 5 cm above the carina . An orogastric tube courses into the stomach . The patient is status post coronary artery bypass graft surgery . The cardiac , mediastinal and hilar contours appear stable . There is a small pleural effusion on the left . No definite pleural effusion is identified on the right side . There is no pneumothorax . Patchy opacities are present at both lung bases , greater on the left than right .
    OUTPUT:
    
Status post endotracheal intubation . Patchy opacities at the lung bases and small suspected pleural effusion on the left . Possible etiologies for these include pneumonia or aspiration in addition to atelectasis .