FDG-PET and radiotherapy in lymphoma

Most lymphoma types are fluorodeoxyglucose positron emission tomography (FDG-PET) positive, and FDG-PET/computed tomography (CT) is used routinely in staging and treatment evaluation of lymphomas. PET/CT imaging is important for contouring of the target for radiotherapy and changes the radiation volumes significantly compared with radiotherapy planning based on CT alone. Modern advanced imaging techniques with image fusion and inspiration breath hold have enabled further refinements of radiotherapy for lymphoma, reducing the risks of long-term side effects while maintaining the high cure rate for these diseases.