Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are stable . Aside from minimal atelectasis in the left lower lobe , the lungs are clear . There is no pneumothorax or pleural effusion . Elevation of the left hemidiaphragm is chronic . Sternal wires are intact . There are mild degenerative changes in the thoracic spine . Surgical clips in the left upper mediastinum are again noted
    OUTPUT:
    
No acute cardiopulmonary abnormalities