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 normal . The mediastinal and hilar contours are unremarkable , and there is no pulmonary vascular congestion . Apart from minimal streaky opacity in the left lung base likely reflecting atelectasis , the lungs are clear . No pleural effusion , focal consolidation or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Minimal left basilar atelectasis . Otherwise no acute cardiopulmonary abnormality .