Table 2.
Short-term test-retest reproducibility of ADC and IVIM parameters in normal head and neck tissues
| 4b | 4b gating | 17b | ||
|---|---|---|---|---|
| ICCa | ADC | 0.974 (0.961 – 0.983) | 0.985 (0.977 – 0.990) | 0.978 (0.966 – 0.989) |
| f | 0.794 (0.685 – 0.865) | 0.838 (0.753 – 0.894) | 0.592 (0.378 – 0.733) | |
| D | 0.954 (0.930 – 0.970) | 0.971 (0.955 – 0.981) | 0.959 (0.938 – 0.973) | |
| D* | 0.264 (−0.123 – 0.518) | 0.303 (−0.064 – 0.544) | 0.319 (−0.340 – 0.554) | |
| CVb | ADC | 4.76 | 3.74 | 4.49 |
| f | 20.45 | 15.27 | 22.14 | |
| D | 7.48 | 5.67 | 8.19 | |
| D* | 38.74 | 29.24 | 41.80 | |
| BAAc | ADC | −0.9 (−23.6, 21.7) | −1.0 (−17.2, 15.1) | 0.1 (−19.9, 30.0) |
| f | 1.1 (−73.6, 75.9) | 2.8 (−58.0, 63.6) | −6.2 (−89.5, 77.1) | |
| D | 0.5 (−33.4, 34.3) | −2.2 (−28.0, 23.5) | 2.2 (−38.1, 42.4) | |
| D* | 13.8 (−127.3, 154.9) | −0.4 (−105.2, 104.4) | 7.4 (−138.4, 153.2) |
All numbers in brackets of aICC indicate the 95% confidence interval. The highest ICC value indicates the best reproducibility. The lowest mean of bCV (in %) indicates the best reproducibility. Mean difference and 95% limits of agreement cBAA (in %) are shown. The narrowest value indicates the best reproducibility.