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 re - demonstrated . Aortic knob calcifications are present in the mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Post radiation changes within the left upper and lower lobes are better assessed on the recent CT of the chest . Streaky atelectasis is also demonstrated in the lung bases without focal consolidation . Hyperinflation of the lungs it is re - demonstrated . No pleural effusion or pneumothorax is identified . Mild degenerative changes are seen in the thoracic spine . Sclerotic lesion within the right proximal humerus is re - demonstrated , possibly an enchondroma or infarct .
    OUTPUT:
    
Minimal bibasilar atelectasis . Post radiation changes in the left lung are better assessed on the previous CT . No new focal consolidation to indicate pneumonia .