Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Cardiac silhouette size is normal . Coronary artery stent is re - demonstrated . Mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Lungs are clear without focal consolidation . Small left pleural effusion appears improved compared to the previous study . No pneumothorax is present . No acute osseous abnormalities are detected .
    OUTPUT:
    
Decreased size of small left pleural effusion . Otherwise , no acute cardiopulmonary abnormality .