Modulation transfer function assessment in parallel beam and fan beam collimators with square and cylindrical holes.

@article{Khorshidi2014ModulationTF,
  title={Modulation transfer function assessment in parallel beam and fan beam collimators with square and cylindrical holes.},
  author={Abdollah Khorshidi and Mansour Ashoor},
  journal={Annals of nuclear medicine},
  year={2014},
  volume={28 4},
  pages={363-70}
}
OBJECTIVE This study investigates modulation transfer function (MTF) in parallel beam (PB) and fan beam (FB) collimators using the Monte Carlo method with full width at half maximum (FWHM), square and circular-shaped holes, and scatter and penetration (S + P) components. METHODS A regulation similar to the lead-to-air ratio was used for both collimators to estimate output data. The hole pattern was designed to compare FB by PB parameters. The radioactive source in air and in a water phantom… CONTINUE READING