Fig. 68.

¹⁸F-FAZA, therapy evaluation of a brain lesion. PET/CT findings: four FAZA-PET-CT scans made at different weeks prior (week 0) and during (week 1, 2, and 4) the course of chemoradiation. The rainbow colours depict the amount of FAZA uptake. The light blue line depicts the extent of the primary tumour situated in the base of tongue. The green lines depict the extent of the parotid glands (left and right). Note that in week 2 and 4 no increased FAZA uptake is visible any more, demonstrating that the hypoxic area in week 0 and 1 disappeared