Table 1.
Demographic variables, clinical descriptors, and MR acquisition parameters for lumbar spine data sets
| Number of subjects | Age (y) | Body mass index (kg/m2) | Height (m) | Sex = Female | Is LBP patient | Follow‐up scan | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Demographic variables | |||||||||||
| Data set A | 16 | 41.7 (±11.9) | 27.2 (±4.7) | 1.77 (±8.6) | 4 (25.0%) | 10 (62.5%) | – | ||||
| Data set B | 15 | 48.6 (±13.9) | 26.1 (±4.5) | 1.71 (±9.4) | 9 (60.0%) | 15 (100%) | 4 (21.1%) | ||||
| Pfirrmann | Modified Pfirrmann | Discography + ve discs | Mean VAS/max VAS | IPAQ > 0 | ODI | SF36 physical | SF36 mental | ||||
| Clinical descriptors | |||||||||||
| Data set A | 2.2 (±0.7) | – | 6 (60.0%) | – | – | 28.3 (±26.4) | 42.9 (±12.3) | 49.4 (±13.6) | |||
| Data set B | – | 3.6 (±2.1) | – | 6.8 (±1.9)/8.6 (±1.3) | 8 (53.3%) | 44.9 (±17.5) | – | – | |||
| Scanner | Coil | Sequence name | View | FOV (mm) | Matrix size (x, y) | TR/TE (ms) | TSL (ms), FSL (Hz) | Pixel BW (Hz) | Time (m:s) | Purpose | |
| MR acquisition parameters | |||||||||||
| Data set A | 3T GE Excite Signa | 8‐ch CTL spine coil | T1ρ FSE | Sag | 200 | 256 192 | 2000/80 | 0/40/80/120, 300 | 125 | 6:36 | T1ρ relaxometry |
| T2 FSE | Sag | 200 | 320 224 | 5000/70 | – | 122 | 2:25 | Pfirrmann grading | |||
| Data set B | 3T GE Discovery MR750w | 8‐12‐ch embedded GEM coil | MAPSS T1ρ/T2 | Sag | 200 | 256,128 | 5.7/51 | T1ρ 0/10/40/80, 300 | 488 | 11:33 | T1ρ, T2 relaxometry |
| T2 0/12/25/51 | |||||||||||
| T2 CUBE FSE | Sag | 240 | 160 160 | 2500/91 | – | 244 | 4:13 | Modified Pfirrmann grading | |||
| IDEAL IQ | Ax | 180 | 180 180 | 11/3.9 | – | 651 | 6:37 | Paraspinal muscle qMR | |||
Continuous variables are described as mean (±SD); categorical variables are listed as number of subjects (percentage of total) or number of discs (percentage of total).
Abbreviations: Ax, axial; BW, bandwidth; ch, channel; FSE, fast spin echo; IPAQ, International Physical Activity Questionnaire; LBP, low back pain; MAPSS, magnetization‐prepared angle‐modulated partitioned‐k‐space SPGR snapshots; Sag, sagittal; SF36, Short Form 36 Health Survey; VAS, visual analog scale for pain.