ABSTRACT
The subjects of this chapter are the use of Monte Carlo simulation for scatter correction in single-photon emission computed tomography (SPECT) and its use for the evaluation of scatter-correction methods. Gamma-ray scattering that involves no energy loss (coherent scattering, alias Rayleigh scattering) is of negligible importance compared to Compton scattering for high gamma ray energies and low atomic number elements [1]. Patient scattering usually involves high gamma ray energies and low atomic number elements and so usually no corrections are made for coherent scattering. Possible exceptions might be Bremsstrahlung imaging with respect to energy and bone interactions with respect to atomic number. Collimator scattering usually involves lead, a high atomic number element, and so it might also be a possible exception.
