Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size appears mildly enlarged with a coronary artery stent again noted . The aorta remains tortuous . Mediastinal and hilar contours are similar , and the pulmonary vasculature is normal . Lungs appear clear , though the medial lung apices are somewhat obscured by the patient 's chin projecting over this area . No pleural effusion or pneumothorax is present . Moderate multilevel degenerative changes are noted in the thoracic spine . Prominent gaseous distention of colonic loops of bowel in the left upper quadrant are noted .
    OUTPUT:
    
No acute cardiopulmonary abnormality .