Table 1.

Mean ADC values (x 10⁻³ mm²/s) across nine centres for different combinations of calculation conditions. The mean %-wise ADC differences between b-sets (all-b-values minus b≥150 s/mm²), ROI/voxel-based analysis (ROI-based minus voxel-based) and mean/median values (mean minus median) are shown.

	All b-values				b ≥ 150 s/mm2				Mean difference (%)
	ROI-based		Voxel-based		ROI-based		Voxel-based
	Mean	Median	Mean	Median	Mean	Median	Mean	Median	b-sets	ROI/vox	Mean/median
Adrenal gland
GTV	1.27	1.37	1.21	1.24	0.90	0.97	0.88	0.90	32.86	5.84	−4.91
VTV	1.26	1.34	1.23	1.24	0.88	0.96	0.87	0.90	33.69	4.40	−4.47
Pancreas
GTV	0.95	0.95	0.88	0.96	0.88	0.85	0.81	0.82	11.05	4.30	−1.59
VTV	1.08	1.08	1.03	1.07	1.03	1.06	0.98	1.00	4.59	3.90	−2.18
Oligo metastasis
GTV	1.51	1.41	1.44	1.34	1.33	1.33	1.29	1.19	10.35	5.99	5.48
VTV	1.49	1.39	1.43	1.32	1.33	1.31	1.29	1.18	9.58	5.45	6.33
Prostate
GTV	1.41	1.37	1.35	1.34	1.07	0.99	1.03	1.02	28.41	1.85	3.09
CTV	1.56	1.52	1.49	1.46	1.31	1.29	1.27	1.29	15.62	3.00	1.13
Mean value	1.32	1.30	1.26	1.25	1.09	1.09	1.05	1.04	18.27	4.34	0.36