Non-enhanced high resolution computed tomography provide clear visualization of soft tissue in the canal and bony of spine, particularly of the lumbar spine. We observed 70 cases of spine CT using GE CT/T 8800 scanner during the period from Dec. 1982 to Sep. 1983 at Jeonbug National University Hospital. The results were as follows : 1. The sex distribution of cases were 55 males and 15 females : age was from 17 years to 67 years; sites were 11 cervical spine, 5 thoracic spine and 54 lumbosacral spine. 2. CT diagnosis showed 44 cases of lumbar disc herniation, 7 cases of degenerative disease, 3 cases of spine fracture and each 1 cases of cord tumor, metastatic tumor, spontaneous epidural hemorrhage, epidural abscess, spine tbc., meningocele with diastematomyelia. 3. Sites of hernialted nucleus pulpo년 were 34 cases (59.6%) between L4-5 interspace and 20 cases (35.1%) between L5-S1 interspace. 13 cases (29.5%) of lumbar disc herniation disclosed multiple lesions. Location of herniation were central type in 28 cases (49.1%) right-central type in 12 cases (21.2%), left-central type in 11 cases (19.2%) & far lateral type in 6 cases (10.5%). 4. CT findings of herniated nucleus pulposus were as follows: focal protrusion of posterior disc margin and obliteration of anterior epidural fat in all cases, dural sac indentation in 26 cases (45.6%), soft tissue mass in epidural fat in 21 cases (36.8%) displacement or compression of nerve root sheath in 12 cases(21%) 5. Multiplanar reformatted images and Blink mode provide more effective evaluation about definite level and longitudinal dimension of lesion, such as obscure disc herniation, spine fracture, cord tumor and epidural abscess. 6. Non-enhanced and enhanced high resolutional computed tomography were effectively useful in demonstrating compression or displalcement fo spinal cord and nerve root. examing congenital anomaly such as meningocele and primary or metastatic spinal lesions.