Table 2.

Comparison of contrast-enhanced ultrasound parameters in the malignant and benign tumor groups

	Start time (s)	Initial strength (dB)	Peak time (s)	Peak intensity (dB)	120s Echo intensity (dB)	Peak acceleration time (s)	Intensity increment (dB)	Enhancement rate (dB/s)	Extinction rate (dB/s)
Malignant tumor group	11.98 ± 2.95	8.35 ± 6.03	30.22 ± 9.65	39.27 ± 6.32	27.33 ± 17.86	17.94 ± 4.64	30.99 ± 6.67	2.24 ± 0.21	0.08 ± 0.07
Benign tumor group	13.01 ± 3.92	6.57 ± 5.66	33.33 ± 11.96	37.77 ± 7.30	32.01 ± 11.96	20.10 ± 10.32	31.22 ± 7.12	2.01 ± 0.31	0.06 ± 0.06
t-value	-1.532	1.463	-1.456	1.101	-1.396	-1.533	-0.164	2.589	1.449
P value	0.128	0.146	0.148	0.273	0.166	0.128	0.870	0.011	0.150