Table 4. Changes in quantity (area and volume) of adipose tissue between non-enhanced and contrast-enhanced scans in 2D- and 3D-segmentation.
| Variables | Change 2D (%) | Change 3D (%) (20) | Difference (%) | P | 95% CI (%) | NRMSE2D | NRMSE3D | Difference |
|---|---|---|---|---|---|---|---|---|
| NES vs. ART (n=23) | ||||||||
| TAT | −2.32 (3.63) | −3.71 (5.72) | −0.52 (7.68) | 0.52 | −3.43, 1.19 | 0.071 | 0.082 | +0.011 |
| VAT | −3.51 (3.62) | −4.64 (4.29) | −1.25 (5.39) | 0.25 | −3.14, 0.74 | 0.094 | 0.071 | −0.023 |
| SAT | +0.85 (3.66) | −1.32 (6.88) | −1.51 (6.87) | 0.26 | −4.48, 1.57 | 0.072 | 0.105 | +0.033 |
| NES vs. PVN (n=10) | ||||||||
| TAT | −2.69 (2.29) | −3.23 (7.58) | −1.38 (7.97) | 0.49 | −8.28, 2.78 | 0.054 | 0.103 | +0.049 |
| VAT | −6.68 (6.72) | −10.23 (5.77) | −4.51 (13.95) | 0.32 | −15.12, 4.21 | 0.491 | 0.099 | −0.392 |
| SAT | −0.28 (5.93) | −0.53 (7.30) | −2.90 (15.07) | 0.63 | −10.05, 9.52 | 0.318 | 0.124 | −0.194 |
| NES vs. VEN (n=31) | ||||||||
| TAT | −6.33 (6.42) | −4.72 (8.72) | +0.57 (9.80) | 0.65 | −2.07, 3.66 | 0.116 | 0.133 | +0.017 |
| VAT | −10.91 (10.47) | −9.45 (7.71) | +0.06 (11.16) | 0.99 | −3.80, 3.94 | 0.225 | 0.204 | −0.021 |
| SAT | −0.31 (7.19) | −2.61 (6.97) | −0.29 (12.12) | 0.85 | −4.11, 4.58 | 0.141 | 0.167 | +0.026 |
Data are median in% and (IQR in percentage points). ART, arterial scan; CES, contrast-enhanced scan; CI, confidence interval; NES, non-enhanced scan; PVN, portal-venous scan; NRMSE, normalized root-mean-square error; SAT, subcutaneous adipose tissue; TAT, total adipose tissue; VAT, visceral adipose tissue; VEN, venous scan. The P value (and 95% CI) corresponds to the difference of the changes between 2D- and 3D-segmentation.