Application of PET-CT for radiotherapy of the patient with carcinoma

PET-CT is an advanced imaging instrument combing anatomical and metabolic information into one. Combined with the radiation planning system, PET-CT is playing an increasingly important tool in the diagnosis and staging of malignant disease, image-gulded therapy planning, and treatment monitoring. Especially, PET-CT has a significant role in the delineation of tumor target volume, optimization of radiation planning.