Principles of PET and SPECT II by Roger Fulton, Medical Physics, Westmead Hospital, Sydney, NSW, Australia; Brain and Mind Research Institute, University of Sydney, Sydney, NSW, Australia

Learning Objectives:
• Be able to explain the tracer principle and its importance in PET and SPECT molecular imaging.
• Be able to explain to your peers how radiation emitted from the body is detected externally using SPECT and PET instrumentation.
• Be able to explain the key principles in forming a reconstructed image of the tracer distribution in the body.

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