Application of positron emission tomography/computed tomography in radiation treatment planning for head and neck cancers

Figure 5 Positron emission tomography/computed tomography detects a low neck lymph node involved by metastasis. Increased FDG uptake in the low neck reveals a metastatic lymph node which would otherwise be difficult to detect because of the presence of muscular and vascular structures in this region of the neck (A-D). FDG: Fluorodeoxygluocose.