Table 1.
Comparisons of the apparent diffusion coefficients (ADCs) ( × 10−3 mm2/s) and the normalized ADCs (rADC) for the spleen and the paraspinal muscle based on the twice diffusion weighted imaging (DWI) measurements (n = 73).
| Paraspinal muscle | Spleen | |||||||
|---|---|---|---|---|---|---|---|---|
| Parameter | First DWI | Second DWI | ICC | CV of the two measurementsb | First DWI | Second DWI | ICC | CV of the two measurementsb |
| ADC ( × 10−3 mm2/s) | 1.546 ± 0.084 (1.260–1.706) | 1.551 ± 0.079 (1.290–1.728) | 0.67 | 0.023 ± 0.019 (0.001–0.085) *,† | 0.786 ± 0.095 (0.517–0.979) | 0.787 ± 0.104 (0.547–1.000) | 0.47 | 0.070 ± 0.060 (0.001–0.281) * |
| rADC | 1.996 ± 0.277 (1.557–3.084) | 2.003 ± 0.278 (1.468–2.858) | 0.40 | 0.078 ± 0.068 (0.001–0.333)† | 0.510 ± 0.064 (0.324–0.642) | 0.509 ± 0.070 (0.350–0.681) | 0.39 | 0.078 ± 0.068 (0.001–0.333) |
| CV of ADCa | 0.052 × 10−3 mm2/s | 0.126 × 10−3 mm2/s | ||||||
| CV of rADCa | 0.139 | 0.131 | ||||||
Data are represented as means ± standard deviation; Data in parentheses represent the range of the values.
ADC, apparent diffusion coefficient; CV, coefficient of variation, rADC, ratio of ADC.
*, †P values < 0.001; aThe mean CV values of all the measured ADC values for paraspinal muscle or spleen; bCV was calculated from the two ADC measurements for paraspinal muscle or spleen from each of the 73 patients.