That of CCT were 10/11, 6/7, 4/6, 0; 3/3, 3/7, 0; 7/7, 3/5, 0. Conclusion Radiography and CCT have individual advantages and disadvantages.

• 常规CT为10/11、6/7、4/6、0,3/3、3/7、0和7/7、3/5、0。