Figure 2From: Prospective longitudinal assessment of parotid gland function using dynamic quantitative pertechnate scintigraphy and estimation of dose–response relationship of parotid-sparing radiotherapy in head-neck cancers Boxplot showing median salivary excretion fraction (SEF) ratios at 3-months, 12-months, 24-months, and 36-months after (chemo) radiotherapy. Note the moderate recovery of salivary function continuing till 2-years post-treatment.Back to article page