Fig. 4. Box plots show different ADC levels of salivary glands at 1 week post-RT in patients with different grades of late xerostomia.

Mean and median are given by dotted and solid lines, respectively (dotted lines, means; solid lines, medians; boundaries of boxes, 25%/75% quintiles; error bars, 10%/90% quintiles; data points, outliers). Graph shows that sADC is higher in patients with Grade 1 xerostomia than those with Grade 2 (p = 0.013).