Glioma grading by microvascular permeability parameters derived from dynamic contrast-enhanced MRI and intratumoral susceptibility signal on susceptibility weighted imaging

Table 1 The mean K ^trans ,V _e values,MVD,VD values and ITSS grade of different grades of gliomas

Tumor grade	K ^trans min ⁻¹	V _e	MVD	VD(μm)	ITSS grade
LGG(grade II)	0.026 ± 0.019	0.121 ± 0.130	14.75 ± 4.94	5.10 ± 1.08	1.2
grade III	0.096 ± 0.063	0.483 ± 0.225	26.84 ± 9.17	7.93 ± 1.34	2.8
grade IV	0.135 ± 0.068	0.525 ± 0.180	22.79 ± 3.51	9.83 ± 1.43	2.4
HGG(grade III and IV)	0.117 ± 0.066	0.505 ± 0.197	24.70 ± 6.87	8.93 ± 1.66	2.6

NOTE—K^trans min⁻¹: volume transfer constant, V_e: volume of extravascular extracellular space (EES) per unit volume of tissue, MVD: microvessel density, VD: vessel diameter.

ISSN: 1470-7330