How serious a problem for myocardial perfusion assessment is moderate misregistration between SPECT and CT?

@article{Nichols2007HowSA,
  title={How serious a problem for myocardial perfusion assessment is moderate misregistration between SPECT and CT?},
  author={Kenneth James Nichols},
  journal={Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology},
  year={2007},
  volume={14 2},
  pages={150-2}
}