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Fig. 3 | EJNMMI Research

Fig. 3

From: Interim 4′-[methyl-11C]-thiothymidine PET for predicting the chemoradiotherapeutic response in head and neck squamous cell carcinoma: comparison with [18F]FDG PET

Fig. 3

PET images from a 62-year-old male diagnosed with hypopharyngeal squamous cell carcinoma. The orange-contoured area represents the area with an SUVmax greater than 2.5. Pretreatment transverse [11C]4DST PET image (a) shows an increased uptake in the primary tumor. Pretreatment transverse [18F]FDG PET image (b) also shows an increased uptake in the primary tumor. Interim (after 46 Gy of radiation) transverse [11C]4DST PET image (c) shows no abnormal uptake in the primary region. (The orange-contoured area shows the primary region on the basis of baseline PET study.) Interim (after 40 Gy of radiation) transverse [18F]FDG PET image (d) shows an increased uptake in the hypopharyngeal region. He was classified as showing a complete response at 3 months after treatment

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