. 2021 Aug 3;13(15):3914. doi: 10.3390/cancers13153914

Table 5.

MRI parameters and histologic percentage of collagen content of total resection and residual tumor.

Parameters	Total Resection (n = 36)	Residual Tumor (n = 13)	p Value
rT1	0.854 ± 0.080	0.819 ± 0.078	0.18 ^a
rT2	1.650 ± 0.444	1.600 ± 0.310	0.71 ^a
ADC (10⁻³ mm²/s)	0.820 ± 0.267	0.793 ± 0.179	0.69 ^b
v_e	0.243 ± 0.121	0.288 ± 0.120	0.25 ^a
v_p	0.062 ± 0.075	0.057 ± 0.077	0.85 ^b
K^trans (/min)	0.567 ± 0.466	0.894 ± 0.739	0.16 ^b
k_ep (/min)	2.109 ± 1.472	3.067 ± 2.052	0.14 ^b
PCC (%)	16.45 ± 18.71	22.64 ± 21.58	0.37 ^b

rT1: ratio of signal intensity on T1-weighted MRI; rT2: ratio of signal intensity on T2-weighted MRI; ADC: apparent diffusion coefficient; v_e: volume of extravascular extracellular space per unit volume of tissue; v_p: blood plasma volume per unit volume of tissue; K^trans: volume transfer constant between blood plasma and extravascular extracellular space; k_ep: rate constant between extravascular extracellular space and blood plasma; PCC: percentage of collagen content. Statistical tests used: ^a Mann–Whitney U test, ^b unpaird t-test.