1Jackson RP, Cain JE, Jacobs RR, et al. The neuroradiographic diagnosis of lumbar herniated nucleus pulposus: II. A comparison of computed tomography (CT), myelography, CT-myelography, and magnetic resonance imaging[J]. Spine, 1989,14 (12) : 1362- 1367.
2Wiesel SW, Tsourmas N, Feffer HL, et al. A study of computer assisted tomography: I. The incidence of positive CAT scans in an asymptomatic group of patients[J], Spine, 1984,9 (6) : 549- 551.
