Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right IJ catheter terminates at the cavoatrial junction . Multiple sternal wires to no prior sternotomy . Since the ___ radiograph , there has been improved aeration of both lungs , particularly the left . Mild bibasilar atelectasis remains . There is no pneumothorax . A trace left effusion remains . Mild cardiomegaly is unchanged .
    OUTPUT:
    
1 . Improved aeration of the left lung . 2 . Nearly resolved trace left pleural effusion .