Figure 3

Fluorine-18 fluorodeoxyglucose-positron emission tomography scans. (a) Fluorine-18 fluorodeoxyglucose-positron emission tomography showed uptake of fluorine-18 fluorodeoxyglucose by the tumor (yellow circle). The maximum standard uptake values of the tumor obtained during fluorine-18 fluorodeoxyglucose-positron emission tomography were 14.9 at early imaging (60 minutes). (b) Positron emission tomography 2 years after completing proton beam therapy. There is no evidence of tumor recurrence.