Fig. 6From: NaF PET/CT for response assessment of prostate cancer bone metastases treated with single fraction stereotactic ablative body radiotherapyComparison of (left) baseline and (right) follow-up PET scan of two patients with marginal recurrence. The PTV is shown in blue, and region treated to the prescription dose of 20 Gy is shown in orange. Increased uptake immediately adjacent to the irradiated region is highlightedBack to article page