Arterial spin-labeled magnetic resonance perfusion imaging in prediction of pediatric brain tumors grading: inter-observer agreement

Egyptian Journal of Radiology and Nuclear Medicine

Table 4 Mean absolute and relative TBF according to WHO grade of the studied lesions

	Grade 1	Grade 2	Grade 3&4	Test of significance
Absolute TBF	24.64 ± 3.45^A	33.81 ± 3.59^B	75.60 ± 20.0^AB	F = 66.44 P < 0.001*
Relative TBF	1.01 ± 0.17^A	1.07 ± 0.31^B	3.12 ± 0.24^AB	F = 298.80 P < 0.001*

* statistically signifcant
Similar superscripted letters in same row denote significant difference between groups