Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Mild enlargement of the cardiac silhouette is unchanged . The mediastinal and hilar contours are similar with atherosclerotic calcifications noted at the aortic knob . Pulmonary vasculature is not engorged . Patchy atelectasis is seen in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . Bilateral shoulder arthroplasties are incompletely imaged .
    OUTPUT:
    
No acute cardiopulmonary abnormality .