Table 2.

Changes of IVIM parameters and tumor size during the concurrent chemo- radiotherapy course

Variables	Time point 1	Time point 2	Time point 3	Time point 4
Diameter (cm)	4.17 ± 1.23	2.56 ± 1.26	1.14 ± 1.12	0.20 ± 0.53
f	0.12 ± 0.52	0.20 ± 0.90	0.22 ± 0.79	0.18 ± 0.58
D* (×10−3 mm2/s)	29.23 ± 26.49	33.73 ± 21.76	34.80 ± 21.00	34.44 ± 17.30
ADC (×10−3 mm2/s)	1.00 ± 0.11	1.39 ± 0.26	1.66 ± 0.17	1.67 ± 0.16
D (×10−3 mm2/s)	0.85 ± 0.12	1.09 ± 0.14	1.31 ± 0.11	1.41 ± 0.13

ADC apparent diffusion coefficient, D diffusion coefficient, f perfusion fraction, D* pseudo-diffusion coefficient