Frequency domain implementation of the three-dimensional geometric point response correction in SPECT imaging

@article{Zeng1991FrequencyDI,
  title={Frequency domain implementation of the three-dimensional geometric point response correction in SPECT imaging},
  author={G L Zeng and G T Gullberg},
  journal={Conference Record of the 1991 IEEE Nuclear Science Symposium and Medical Imaging Conference},
  year={1991},
  pages={1943-1947 vol.3}
}
A 3-D iterative reconstruction algorithm which incorporates models of the geometric point response in the projector-backprojector is presented for parallel, fan, and cone beam geometries. It is shown that the geometric response function is shift-invariant for these three geometries if the distance from the collimator face is fixed. This property makes it possible to model the system point response function in the frequency domain. Compared with previous ray-driven models, the frequency domain… CONTINUE READING

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