Figure 2.

Pathria grade on axial T2W1 MRI showing: grade I, facet joint space is 2 mm or greater, no osteophytes or possible small osteophytes can be found (A); grade II, facet joint space is 1 mm to 2 mm, and/or definite small osteophytes can be found (B); grade III, facet joint space is less than 1 mm, and/or definite moderate osteophytes can be found (C); grade IV, facet joint space cannot be found (bone to bone), and/or large osteophytes can be found (D).