Abstract
Since 1975, the authors have introduced the new technology of holography for three-dimensional evaluation of neuroradiograms. In this study we holographed conventional tomograms, axial transverse tomograms, and CT scans of a dry cervical vertebralcolumn. The axis of the spinal canal must be as vertical as possible to the tomographic plane in order to observe deeply inside the spinal canal. The hologram was the most clear when 8-10 sheets of tomographic film with a distance of 3-5 mm between each tomogram were recorded. The hologram from CT scans were more stereoscopic and clear than other types of holograms or the sagittally reconstructed CT. Clinically, the authors produced spinal multi-layered tomogram holograms of CT scans for two cases of cervical spondylosis, one of lumbar disc herniation, three of ossification of posterior longitudinal ligament and one of lipoma of the upper cervical region.
