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. 2020 Aug 6;20:93. doi: 10.1186/s12880-020-00492-1

Fig. 1.

Fig. 1

Schematic diagram of the placements of ROIs. Based on the DW (b1000) image (a) of a 47-year-old patient with a warthin tumor in the right parotid gland, round regions of interest (ROIs) were drawn in parotid tumors (red), ipsilateral masseter muscle (yellow), ipsilateral spinal cord (green) and background (blue), respectively. The central cystic area was avoided for measurement. Then, the same ROIs were copied on the ADC map (b), and the mean ADC value of tumor and masseter were measured