3Wilmink JT. CT morphology of intrathecal lumbosacral nelve-root compression. Am J Neuroradiol, 1989,10(2 ) :233-248.
4胡友谷.腰椎间盘突出症[M].北京:人民卫生出版社,1985.214.
5Wiesel SW,A study of computer assisted tomography: I The incidence of postive CAT scans in an asympromatic group of patients [J]. Spine, 1984,9:549 - 550.