Table 2 T1ρ, T2 and T2* relaxation times in nucleus pulposus for different Pfirrmann grades
From: T1ρ, T2 and T2* mapping of lumbar intervertebral disc degeneration: a comparison study
Pfirrmann grades | T1ρ relaxation time (ms) | T2 relaxation time (ms) | T2* relaxation time (ms) |
|---|---|---|---|
I (n = 32) | 181.17 (110.23–239.88) | 138.39 (99.48–204.70) | 85.70 (25.81–198.85) |
II (n = 64) | 170.81 (111.61- 231.40) | 114.98 (87.60–179.160) | 56.28 (19.63- 121.16) |
III (n = 52) | 124.36 (87.11–196.19) | 77.28 (37.55–130.76) | 40.16 (20.97- 101.29) |
IV (n = 40) | 99.91 (77.69–142.08) | 53.02 (22.02–146.67) | 32.79 (14.27–57.33) |
V (n = 7) | 96.66 (81.80–103.62) | 51.42 (39.52–66.45) | 23.46 (9.62–53.21) |
rho a | -0.73 | -0.88 | -0.61 |
P value | < 0.001 | < 0.001 | < 0.001 |