Table 6.

Comparison of 40kev∼140kev single-energy CT values for different microvessel densities in venous stage colorectal cancer (,HU)

Single energy level/kev	Low MVD group/(n = 52)	Hign MVD group/(n = 30)	t	P
40	168.88 ± 26.97	238.59 ± 23.29	−11.83	0.001
50	123.72 ± 16.22	166.62 ± 13.33	−12.28	0.001
60	95.44 ± 10.41	128.27 ± 13.92	−12.13	0.001
70	77.63 ± 7.29	100.02 ± 10.81	−11.19	0.001
80	66.56 ± 6.04	82.36 ± 8.51	−9.79	0.001
90	59.12 ± 5.69	70.67 ± 6.69	−8.30	0.001
100	53.92 ± 5.70	62.83 ± 6.19	−6.60	0.001
110	50.28 ± 5.89	57.09 ± 5.97	−5.02	0.001
120	47.82 ± 6.06	53.02 ± 5.75	−3.81	0.001
130	45.76 ± 6.25	50.19 ± 5.47	−3.23	0.001
140	44.20 ± 6.41	48.82 ± 8.09	−2.85	0.001