Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multiple sternal wires and mediastinal clips denote prior CABG . Rib fixation hardware is also present . There has been interval removal of a right IJ central venous catheter . There is no pneumothorax . Small bilateral pleural effusions are slightly increased since the prior study . The cardiac and mediastinal contours remain unchanged . Widespread multifocal airspace opacities have improved . Mild central pulmonary vascular congestion and edema have also improved .
    OUTPUT:
    
1 . Improved multi focal airspace opacities since ___ . 2 . Improved background mild pulmonary edema . 3 . Interval enlargement of small bilateral pleural effusions .