Optimal b value of diffusion-weighted imaging on a 3.0T magnetic resonance scanner in Crohn’s disease

Table 2 Mean contrast-to-noise ratios of four b value diffusion-weighted imaging sequences

	b = 800	b = 1500	b = 2000	b = 2500
b = 800	79.30 ± 34.59	P = 0.006	P < 0.01	P < 0.01
b = 1500	P = 0.006	57.66 ± 23.95	P = 0.007	P = 0.003
b = 2000	P < 0.01	P = 0.007	36.52 ± 14.95	P = 0.820
b = 2500	P < 0.01	P = 0.003	P = 0.820	34.78 ± 24.83

Unit of b value in diffusion-weighted imaging is s/mm².