Table 1 Imaging parameters for T2-weighted imaging, T1ρ, T2 and T2* mapping
From: T1ρ, T2 and T2* mapping of lumbar intervertebral disc degeneration: a comparison study
sagittal T1ρ mapping | sagittal T2 mapping | sagittal T2* mapping | sagittal T2-weighted images | axial T2-weighted images | |
|---|---|---|---|---|---|
field of view(mm2) | 220 × 245 | 220 × 245 | 220 × 245 | 220 × 245 | 180 × 180 |
matrix | 432 × 432 | 432 × 432 | 432 × 432 | 432 × 432 | 448 × 448 |
thickness | 5 mm | 5 mm | 5 mm | 5 mm | 4 mm |
slices | 9 | 9 | 9 | 9 | 3/each disc |
in-plane resolution | 0.57 × 0.57 | 0.57 × 0.57 | 0.57 × 0.57 | 0.57 × 0.57 | 0.40 × 0.40 |
repetition time | 4.8 ms | 2000 ms | 310 ms | 2500 ms | 3000 ms |
echo time | 2.4 ms | 13/26/39/52 /65 ms | 5.1/10.0/14.9/19.8/24.7 ms | 90 ms | 100 ms |
flip angle | 50° | 90° | 25° | 90° | 90° |
NSA | 1 | 1 | 2 | 1 | 1 |
scanning time | 5 min 45 s | 4 min 56 s | 2 min 45 s | 1 min 27 s | 2 min 6 s |