Reproducibility study of intravoxel incoherent motion and apparent diffusion coefficient parameters in normal pancreas

Table 3 Comparison of diffusion coefficient, false diffusion coefficient, and perfusion fraction values of the pancreatic head, body, and tail measured using machines A, B, and C

Region and parameter	Machine A	Machine B	Machine C	Mixed liner model		Post-hoc test		95% limits of agreement
				F	P value	Pair comparison	P1 value
PaH
D	1.08 ± 0.27	1.15 ± 0.22	1.22 ± 0.23	2.893	0.078	A vs B	0.986	-0.56, 0.38
						A vs C	0.140	-0.47, 0.44
						B vs C	0.311	-0.32, 0.27
D*	0.07 ± 0.04	0.05 ± 0.03	0.05 ± 0.02	2.275	0.128	A vs B	0.139	-0.13, 0.03
						A vs C	0.327	-0.11, 0.03
						B vs C	0.531	-0.05, 0.04
f	0.40 ± 0.18	0.33 ± 0.15	0.23 ± 0.07	15.725	0.001	A vs B	0.483	-0.57, 0.16
						A vs C	0.001	-0.52, 0.00
						B vs C	0.030	-0.40, 0.06
PaB
D	1.05 ± 0.24	1.09 ± 0.18	1.21 ± 0.20	10.060	0.001	A vs B	0.999	-0.46, 0.27
						A vs C	0.003	-0.21, 0.33
						B vs C	0.027	-0.27, 0.31
D*	0.06 ± 0.04	0.05 ± 0.04	0.06 ± 0.02	0.228	0.798	A vs B	0.999	-0.12, 0.05
						A vs C	0.999	-0.08, 0.04
						B vs C	0.999	-0.09, 0.05
f	0.30 ± 0.15	0.37 ± 0.20	0.24 ± 0.07	3.174	0.062	A vs B	0.513	-0.36, 0.27
						A vs C	0.420	-0.39, 0.11
						B vs C	0.066	-0.57, 0.10
PaT
D	1.07 ± 0.16	1.12 ± 0.22	1.15 ± 0.18	2.438	0.112	A vs B	0.999	-0.42, 0.28
						A vs C	0.258	-0.34, 0.29
						B vs C	0.601	-0.19, 0.14
D*	0.08 ± 0.04	0.05 ± 0.03	0.07 ± 0.02	9.451	0.001	A vs B	0.002	-0.10, 0.00
						A vs C	0.999	-0.11, 0.04
						B vs C	0.058	-0.06, 0.06
f	0.25 ± 0.08	0.26 ± 0.10	0.25 ± 0.12	0.191	0.827	A vs B	0.999	-0.20, 0.12
						A vs C	0.999	-0.25, 0.13
						B vs C	0.999	-0.27, 0.12

¹The Bonferroni method was used to adjust the P value. The adjusted P value was equal to the original P value multiplied by 3. PaH: Pancreatic head; ADC: Apparent diffusion coefficient; D: Diffusion coefficient; PaT: Pancreatic tail; PaB: Pancreatic body; f: Perfusion fraction; D*: False diffusion coefficient.