Skip to main content

Table 1 Classification of intervertebral disk degeneration on MRI (Pfirrman scale)

From: Distribution of Modic changes in patients with low back pain and its related factors

Grades Structures Distinction between nucleus and annulus Signal intensity Disk height
I Bright white, homogeneous Clear Hyperintense, isointense to cerebrospinal fluid Normal
II Inhomogeneous with or without horizontal bands Clear Hyperintense, isointense to cerebrospinal fluid Normal
III Gray, inhomogeneous Unclear Intermediate Normal to slightly decreased
IV Gray to black, inhomogeneous Lost Intermediate to hypointense Normal to moderately decreased
V Black, inhomogeneous Lost Hypointense Collapsed