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Table 1: Median values of the maximal perfusion parameters and coefficient of variation for different grades of gliomas using a 2D gradient-recalled echo sequence on a 1.5T MR imaging scanner
No. K^trans_ϕ(min⁻¹) (95% CI) CV(%) K^trans_SI(min⁻¹) (95% CI) CV(%) V_{p_}ϕ (mL/100 g)  (95% CI) CV(%) V_{p_}SI (ml/100 g)  (95% CI) CV(%)
Grade 2 8 0.0086 (0.0010–0.047) 153 0.0032 (0.00056–0.17) 210 0.66 (0.091–1.55) 91 1.35 (0.22–6.9) 143
Grade 3 4 0.020 142 0.0052 191 1.37 105 2.8 114
Not defined Not defined Not defined Not defined 
Grade 4 19 0.10 (0.072–0.13) 46 0.13 (0.073–0.23) 85 2.0 (1.7–3.1) 78 8.8 (5.3–14) 76

	No.	K^trans_ϕ(min⁻¹) (95% CI)	CV(%)	K^trans_SI(min⁻¹) (95% CI)	CV(%)	V_{p_}ϕ (mL/100 g) (95% CI)	CV(%)	V_{p_}SI (ml/100 g) (95% CI)	CV(%)
Grade 2	8	0.0086 (0.0010–0.047)	153	0.0032 (0.00056–0.17)	210	0.66 (0.091–1.55)	91	1.35 (0.22–6.9)	143
Grade 3	4	0.020	142	0.0052	191	1.37	105	2.8	114
		Not defined		Not defined		Not defined		Not defined
Grade 4	19	0.10 (0.072–0.13)	46	0.13 (0.073–0.23)	85	2.0 (1.7–3.1)	78	8.8 (5.3–14)	76