Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart size is unchanged , and top - normal in size . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is normal . Streaky opacity in the left lung base likely reflects atelectasis . An approximately 1 cm nodular opacity within the right lung base persists , unchanged . No focal consolidation , pleural effusion or pneumothorax is identified . No acute osseous abnormality is visualized .
    OUTPUT:
    
Minimal left basilar atelectasis . Unchanged approximately 1 cm right basilar nodular opacity for which a chest CT is recommended , as noted on the prior report . No evidence of pneumonia or congestive heart failure .