Table 2. Quantitative parameters in the regions of interest (ROIs) of 115 hepatocellular carcinomas (HCCs) and peripheral reference tissues according to the three differentiated HCC groups.

ROI	n	IMAX1 (%)	RT1 (s)	TTP1 (s)	RS1	IMAX2 (%)	RT2 (s)	TTP2 (s)	RS2	WT (s)
Group 1	18	139.15±45.04	12.66±4.27	13.28±4.22	11.01±5.69	100	21.40±6.47	25.43±8.14	4.38±1.68	36.66±9.61a
Group 2	59	118.45±32.53	13.37±5.21	14.06±5.56	9.72±4.63	100	23.70±9.53	26.66±10.14	4.20±1.30	19.37±2.83b
Group 3	38	118.10±31.50	13.07±3.71	13.87±3.91	9.36±4.03	100	23.63±6.59	26.01±6.87	4.10±1.11	11.61±2.78c
p		0.529	0.843	0.820	0.547		0.454	0.893	0.746	0.039

IMAX, maximum intensity of HCC; RS, rise slope; RT, rise time of HCC; TTP, time to peak of HCC; WT, washout time. IMAX1, RT1, TTP1 and RS1 show the parameters of HCC. IMAX2, RT2, TTP2 and RS2 show the parameters of peripheral reference tissue, and IMAX2 is constant.

Group 1, Group 2 and Group 3 correspond to well-differentiated, moderately differentiated and poorly differentiated HCCs, respectively.

^aGroup 1 vs Group 2, p=0.011.

^bGroup 2 vs Group 3, p=0.004.

^cGroup 1 vs Group 3, p=0.000.