Note citations are based on reference standards however formatting rules can vary widely between applications and fields of interest or study the specific requirements or preferences of your reviewing publisher classroom teacher institution or organization should be applied. Radionuclide scanning uses the radiation released by radionuclides called nuclear decay to produce images a radionuclide is an unstable isotope that becomes more stable by releasing energy as radiation this radiation can include gamma ray photons or particulate emission such as positrons used in pet. Basic principles of radionuclide imaging an in depth review of the techniques of radionuclide imaging is beyond the scope of this chapter a brief overview is presented here radionuclide imaging begins with the administration of a radiolabelled tracer the tracer contains a radioactive isotope bound to a complex or molecule which determines . Principles this section does 2 d view of a 3 dimensional structure the image obtained by a gamma camera is a 2 d view of 3 d distribution of a radionuclide spect imaging is performed by using a gamma camera to acquire multiple 2 d images wikimedia commons has media related to single photon emission computed tomography. Basics of spect pet and pet ct imaging 1 basics of spect pet and pet ct imaging i introduction basic principles in the diagnostic imaging two kinds of modalities can be differentiated on one side the in radioactive decay by positron emission