Fig. 6

Box-whisker plots of ADC_0Hz^mean and ADC_50Hz^mean (a), ADC_0Hz^5th and ADC_50Hz^5th (b), and ADC_0Hz^95th and ADC_50Hz^95th (c) of peritumoral regions for glioblastomas and brain metastases. For each tumor, each index for ADC_50Hz was significantly higher than the corresponding index for ADC_0Hz (each p < 0.01, respectively) (a–c). Box-whisker plots of cADC^mean (d), cADC^5th (e), and cADC^95th (f) of peritumoral regions for glioblastomas and brain metastases. Box-whisker plots of rcADC^mean (g), rcADC^5th (h), and rcADC.^95th (i) of peritumoral regions for glioblastomas and brain metastases. No significant difference in any of the three indices of ADC_0Hz, ADC_50Hz, cADC, and rcADC was observed between brain metastases and glioblastomas (Fig. 6a–i). Statistical tests used: _apaired-t test, _bMann–Whitney U test