Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant change from the prior radiograph . The lungs are clear . Linear right middle lobe atelectasis or scarring is unchanged . The hilar and cardiomediastinal contours are normal . Heart is top - normal in size . There is no pneumothorax . There is no pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
No acute cardiopulmonary process .