Association between high-resolution MRI-detected extramural vascular invasion and tumour microcirculation estimated by dynamic contrast-enhanced MRI in rectal cancer: preliminary results

Table 3 DCE-MRI parameters in patients with different mrEMVI statuses

	Total	mrEMVI (−)	mrEMVI (+)	P
	n = 72 (100%)	n = 47 (65.3%)	n = 25 (34.7%)	P
K^trans (min⁻¹)	0.231 ± 0.099	0.238 ± 0.104	0.217 ± 0.089	0.390^a
k_ep (min⁻¹)	0.859 ± 0.369	0.938 ± 0.364	0.710 ± 0.337	0.012^a*
v _e	0.307 ± 0.099	0.288 ± 0.094	0.344 ± 0.101	0.021^a*

DCE-MRI dynamic contrast-enhanced magnetic resonance imaging, mrEMVI magnetic resonance imaging-detected extramural vascular invasion, K^trans volume transfer constant between blood plasma and extravascular extracellular space (EES), k_ep rate constant between EES and blood plasma, v_e volume of EES per unit volume of tissue
^aindependent samples t-test, *indicates a significant difference

ISSN: 1471-2407