Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes injury the cardiac silhouette and bronchovascular structures . With this limitation in mind , heart size is normal . Aorta is mildly tortuous . Lungs and pleural surfaces are essentially clear .
    OUTPUT:
    
Limited chest radiograph demonstrating no acute cardiopulmonary radiographic abnormality . If symptoms persist , repeat radiograph with improved inspiratory level may be helpful for more complete assessment .