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Fig 4. Box plots of DWI SI ratios (A) in high-grade and low-grade gliomas, and ADC values (B) of high-grade and low-grade gliomas and normal subcortical white matter at b = 1000 and 3000 s/mm2. The horizontal line is the median, and the upper and lower ends of the boxes are the upper and lower quartiles, respectively. The vertical lines represent data ranges. A, The mean SI ratio of high-grade gliomas was significantly higher than that of low-grade gliomas at both b-values (P < .01). Note that the difference between the mean SI ratios of high-grade and low-grade gliomas at b = 3000 s/mm2 was significantly greater than at b = 1000 s/mm2 (P < .05). B, The mean ADC value of high-grade gliomas was significantly lower than that of low-grade gliomas at both b-values (P < .01). The mean ADC values of high-grade and low-grade gliomas and normal subcortical white matter at b = 3000 s/mm2 were significantly lower than at b = 1000 s/mm2, respectively (P < .01).
