T1ρ, T2 and T2* mapping of lumbar intervertebral disc degeneration: a comparison study

Table 5 Diagnostic performance of T1ρ, T2 and T2* relaxation times in nucleus pulposus for lumbar disc bulging, herniation and annular tears

Modalities and morphologic changes	AUC (95%CI)	P value	Cutoff (ms)	Sensitivity (%)	Specificity (%)
T1ρ mapping
Bulging vs. normal	0.78 (0.71–0.85)	< 0.001	≤ 136.94	80.00	67.74
Herniation vs. normal	0.87 (0.81–0.94)	< 0.001	≤ 139.88	95.24	66.13
annular tear vs. no tear	0.79 (0.72–0.85)	< 0.001	≤ 139.88	91.11	59.33
T2 mapping
Bulging vs. normal	0.83 (0.76–0.90)	< 0.001	≤ 87.04	84.00	77.42
Herniation vs. normal	0.89 (0.83–0.94)	< 0.001	≤ 82.36	95.24	80.65
annular tear vs. no tear	0.82 (0.76–0.89)	< 0.001	≤ 82.28	86.67	71.33
T2* mapping
Bulging vs. normal	0.64 (0.55–0.72)	0.002	≤ 55.85	82.00	47.58
Herniation vs. normal	0.69 (0.57–0.80)	0.009	≤ 41.66	71.43	64.52
annular tear vs. no tear	0.69 (0.61–0.77)	< 0.001	≤ 57.33	91.11	40.67

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