Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The patient is status post median sternotomy and CABG . There is mild left base atelectasis . No new focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable . There is persistent moderate compression of a lower thoracic vertebral body , also seen on the prior study . No displaced fracture is seen .
    OUTPUT:
    
No acute intrathoracic process .