Abstract
A castrated beagle of four years and 11 months was diagnosed as having a cervical intervertebral disc protrusion by three-dimensional images of multi-slice computerized tomography, and immediately decompression surgery was performed. The ‘Vertical slot method’, which aims at reducing the pressure of the spinal cord by sucking out herniated tissues through a slot drilled into the vertebral body, was applied. Three-D images taken twice during the surgery were helpful in evaluating the degree of achievement of the procedure. The dog has had a satisfactory postoperative course. This result suggests that watching intra-operative 3-D images of multi-slice CT may be useful during decompression surgery of herniated intervertebral disc, although visual inspection was also used conventionally.