The application of Positron Emission Tomography (PET) using 2-[F18] fluoro-2-deoxy- D-Glucose (FDG) and the more recently fused technique of Computerized Tomography and PET (PET/CT) in patients with breast cancer is reviewed. Their role in diagnosis of primary tumour, staging, chemotherapy monitoring and radiotherapy planning, follow-up and restaging is introduced. The advantages of combination of anatomical and functional images are emphasized and the comparison with other imaging techniques is highlighted
