Table 2. Differences of Perfusion and Diffusion Parameters between Muscles and Tumors.

	Tumor	Masseter Muscle	P
ADC	1.132 ± 0.385	1.276 ± 0.131	< 0.001
D	0.959 ± 0.393	1.589 ± 0.132	0.002
D*	188.713 ± 79.640	287.776 ± 218.693	0.086
f	0.147 ± 0.044	0.143 ± 0.067	0.849
Wash-in	0.284 ± 0.263	0.025 ± 0.045	< 0.001
Emax	2.434 ± 0.671	0.766 ± 0.480	< 0.001
Tmax	48.303 ± 38.077	85.281 ± 30.596	0.001
AUC60	95.493 ± 38.757	22.734 ± 23.071	< 0.001
AUCw	823.105 ± 206.401	288.938 ± 197.374	< 0.001

For definitions of indicated parameters please refer to Imaging Processing section of Materials and Methods. Except p value, data are expressed as mean ± standard deviation. Unit for ADC, D and D^* value is × 10^-3 mm²/s. Unit for T_max is second. ADC = apparent diffusion coefficient, AUC_w = whole area under the curve, AUC₆₀ = the initial 60-second area under the curve, E_max = the maximum amplitude of enhancement, T_max = the time at which E_max occurs