Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no pneumothorax . There is no pleural effusion . Heart size is normal . Mediastinal contours are unremarkable . Within the limitations of a non-dedicated rib series , there does not appear to be any rib fractures .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .