Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has had prior median sternotomy and CABG , which remain in standard position . Lung volumes have increased . There is mild cardiomegaly with interval improvement of the vascular congestion and mild interstitial edema . Small right and moderate left pleural effusions are noted . Retrocardiac opacity is unchanged . .
    OUTPUT:
    
Interval improved aeration with interval improvement of the mild interstitial edema . Left lower lobe atelectasis / consolidation with adjacent moderate effusion is unchanged .