Comparison of Bone Metastases between ¹⁸F-NaF PET/CT, ¹⁸F-NaF PET, and Planar ^99mTc-MDP Bone Scintigraphy in Patients with Newly Diagnosed Nasopharyngeal Carcinoma

Figure 3

A 59-year-old man with NPC and planar ^99mTc-MDP bone scintigraphy with two increased tracer uptake lesions in the 5th lumber spine (arrow) and right iliac (arrowhead) suggestive of bone metastases (a). ¹⁸F-NaF showed false positives in the lumbar spine and true negatives in the right iliac bone (b). Clear identification of benign lesion of the right iliac bone in ¹⁸F-NaF PET/CT (b, c) (short arrows). Correlation of PET findings with morphologic changes on CT in the small joint of the right 5th lumbar vertebra (d) (long arrows), suggestive of degenerative changes (correctly according to the reference standard).

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