Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . The lungs are clear . Costophrenic angles are sharp . The cardiomediastinal silhouette is stable , noting mildly tortuous aorta . Osseous and soft tissue structures are unchanged , noting surgical clips within the neck on the left .
    OUTPUT:
    
No acute cardiopulmonary process .