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Table 2: 
Sensitivity, specificity, PPV, and NPV for conventional imaging and the five qualitative and quantitative methods of PASL and ADC for distinguishing high-grade from low-grade gliomas
CIrTPmaxmADCsTPsADCsTP and sADC
Sensitivity (%)77.395.590.986.486.490.9
Specificity (%)72.781.881.890.972.790.9
PPV (%)85.091.390.995.086.495.2
NPV (%)66.790.181.876.972.783.3
  • Note:—CI indicates conventional image; rTPmax, ratio of maximum tumor perfusion signal intensity; mADC, minimum ADC value; sTP, qualitative scoring of tumor perfusion signal intensity; sADC, qualitative scoring of ADC value; PPV, positive predictive value; NPV, negative predictive value.