Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are normal , and lungs appear to be clear bilaterally . Heart is normal in size . Thoracic aorta appears to be tortuous and calcifications are noted within the arch . Cardiomediastinal contours are otherwise unremarkable . No pleural effusions and no pneumothorax .
    OUTPUT:
    
Normal radiographic study of the chest .