Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains top normal . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is normal . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . There are mild multilevel degenerative changes seen in the thoracic spine with mild loss of height anteriorly of a mid thoracic vertebral body .
    OUTPUT:
    
No acute cardiopulmonary abnormality .