Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post recent CABG with stable postoperative appearance of the mediastinum . Again appreciated is the significant cardiomegaly especially of the left ventricular contour with tortuous aorta . Bibasilar lung opacities are improved . There is a persistent small to moderate left pleural effusion . A right internal jugular central venous catheter is unchanged in position with the tip projecting over the mid SVC . There is no pneumothorax .
    OUTPUT:
    
Improvement of bibasilar opacities with persistent small to moderate left pleural effusion .