Table 2 Variation of the EIT-related parameters at the seven different levels in healthy volunteers (n = 8)
Parameters | L− 2 cm | L0 cm | L2 cm | L4 m | L6 cm | L8 cm | L10 cm | P-value (ANOVA) |
|---|---|---|---|---|---|---|---|---|
Global-TV (au) | 1822 ± 970 | 2988 ± 733 | 3079 ± 863 | 4042 ± 1010 | 4957 ± 1305 | 2980 ± 696 | 1987 ± 610 | < 0.0001 |
ROI1 ΔZ (au) | 77 ± 104 | 231 ± 127 | 287 ± 64 | 435 ± 144 | 502 ± 104 | 384 ± 129 | 266 ± 78 | < 0.0001 |
Percentage (%) | 3.0 ± 3.0 | 7.5 ± 3.2 | 9.6 ± 1.7 | 11.1 ± 3.8 | 10.6 ± 3.0 | 12.9 ± 3.1 | 14.2 ± 4.8 | < 0.0001 |
ROI2 ΔZ (au) | 503 ± 307 | 959 ± 250 | 1111 ± 265 | 1727 ± 665 | 1953 ± 492 | 1433 ± 383 | 1032 ± 335 | < 0.0001 |
Percentage (%) | 28.8 ± 10.0 | 32.6 ± 6.1 | 36.6 ± 5.3 | 42.2 ± 8.0 | 40.4 ± 8 | 47.8 ± 4.4 | 52.3 ± 7.9 | < 0.0001 |
ROI3 ΔZ (au) | 1044 ± 540 | 1472 ± 394 | 1378 ± 481 | 1720 ± 790 | 1859 ± 603 | 950 ± 193 | 593 ± 297 | < 0.0001 |
Percentage(%) | 57.5 ± 6.9 | 49.3 ± 3.7 | 44.3 ± 4.7 | 41.7 ± 10.2 | 37.7 ± 7.1 | 32.2 ± 2.8 | 28.8 ± 9.3 | < 0.0001 |
ROI4 ΔZ (au) | 198 ± 131 | 326 ± 187 | 303 ± 156 | 372 ± 213 | 400 ± 262 | 215 ± 106 | 97 ± 61 | 0.135 |
Percentage(%) | 10.5 ± 5.6 | 10.6 ± 3.9 | 9.4 ± 2.4 | 8.6 ± 3.4 | 7.6 ± 4.0 | 7.1 ± 2.6 | 4.7 ± 2.9 | 0.135 |
Upper right ΔZ (au) | 264 ± 254 | 671 ± 236 | 795 ± 196 | 1201 ± 411 | 1289 ± 327 | 861 ± 195 | 615 ± 19 | < 0.0001 |
Upper left ΔZ (au) | 489 ± 231 | 311 ± 182 | 565 ± 169 | 917 ± 378 | 1117 ± 303 | 925 ± 285 | 660 ± 244 | < 0.0001 |
Lower right ΔZ (au) | 754. ± 393 | 1039 ± 354 | 948 ± 401 | 1189. ± 589 | 1221 ± 564 | 620 ± 187 | 367 ± 187 | < 0.0001 |
Lower left ΔZ (au) | 717 ± 243 | 472 ± 256 | 703 ± 257 | 877 ± 44 | 1002 ± 304 | 529 ± 133 | 312 ± 168 | < 0.0001 |