Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , findings are essentially unchanged . Lung fields are clear . There are no new focal consolidations , pleural effusions , pulmonary edema , or pneumothorax . The cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
No radiographic evidence of an acute cardiopulmonary process .