Fig. 1From: A possible correlation between facet orientation and development of degenerative cervical spinal stenosisMeasurement method of the facet joint angle and anteroposterior diameter (A-P diameter) of spinal canal in the transverse MRI image. A facet line was drawn connecting the anterior and posterior margins of each of the superior articular facet. Then, a mid-sagittal line was added that passed through the center of the base of the spinous process. The angle between the facet line and the midsagittal line was defined as the facet angleBack to article page