Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Stable tortuosity of the thoracic aorta . Normal hilar contours . Stable elevation of the left hemidiaphragm with an unchanged opacity at the left costophrenic angle , consistent with a known , fat containing diaphragmatic hernia . Normal pleural surfaces . Clear lungs .
    OUTPUT:
    
No acute cardiopulmonary process .