Fig. 1From: Ultrashort time-to-echo T2* and T2* relaxometry for evaluation of lumbar disc degeneration: a comparative studyMR images of the lumbar spine of a 39-year-old woman. Every lumbar IVD was cut into 5 uniform parts in each UTE-T2* and T2* mapping. An ROI of 1 represented AAF, ROI 2–4 represented NP, and ROI 5 represented PAF. IVD, intervertebral disc; NP, nucleus pulposus; PAF, posterior annulus fibrosus; ROI, region of interest; UTE, ultrashort time-to-echoBack to article page