Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate unremarkable cardiomediastinal and hilar contours . Lungs are clear . No pleural effusion or pneumothorax identified . Sternotomy sutures are midline and intact . Degenerative changes noted in the thoracic spine . Incompletely visualized tubular processes project over the right upper abdomen .
    OUTPUT:
    
No acute cardiopulmonary process .