Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Heart size is normal . Mediastinal and hilar contours are unremarkable . There is no pulmonary vascular congestion . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is identified . Multilevel degenerative changes are present within the thoracic spine . Anterior compression deformity of a low thoracic vertebral body is unchanged . No displaced rib fractures are identified .
    OUTPUT:
    
No acute cardiopulmonary process . No displaced rib fracture seen . If there is continued concern for rib fracture , a dedicated rib series is suggested .