Classification criteria for spondyloarthropathies

Figure 1 Normal radiograph of the pelvis and early changes on sacroiliac magnetic resonance imaging of a male patient at the early stages of the disease at the pre-radiographic stage. A: Thirty-five year old male, normal anterior posterior pelvis radiograph; B: T1-weighted Fast Spin Echo semi-oblique coronal scans of the sacroiliac joints; C: T2-weighted fat suppressed images shows bone edema at both sacral and iliac bones; D: T1-weighted post-contrast image shows enhancement of the contrast media revealing acute inflammation.