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. 2018 Feb 20;131(4):440–447. doi: 10.4103/0366-6999.225053

Figure 4.

Figure 4

Select the ROI and measure the ADC value on ADC map. (a) The ADC map of patient 6. The green circle is the select area. (b) The ROC curve of ADC value between intracranial RDD and malignant lymphomas. The area under the ROC curve was 0.859. The optimum ADC was 0.79 × 10−3 mm2/s (62.5% sensitivity and 100% specificity). (c) The ROC curve of ADC value between meningoma and intracranial RDD. The area under the ROC curve was 0.813. The optimum ADC was 0.92 × 10−3 mm2/s (62.5% sensitivity and 100% specificity). ROI: Region of interest; ADC: Apparent diffusion coefficient; ROC: Receiver operating characteristic curve; RDD: Rosai-Dorfman disease.