Fig. 3
Relationship between disc signal intensity with Pfirrmann scores. a Relationship between raw disc signal intensity and Pfirrman scores. b Relationship between disc signal intensity ratio 1 and Pfirrman scores. c Relationship between disc signal intensity ratio 2 and Pfirrman scores. SI = signal intensity; Signal intensity ratio 1 was calculated by dividing the raw signal intensity value by the intensity value of the cerebrospinal fluid reference at the same spinal level; signal intensity ratio 2 was calculated by dividing by the raw signal intensity value by the intensity value of the brightest cerebrospinal reference at any spinal level. Data points represent the mean and error bars represent SD