@misc{indiciaebad43a7856ad,
  title = {Collimator angulation error and its effect on SPECT.},
  author = {R E Malmin and P C Stanley and W R Guth},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2341901/},
  note = {Source identifier: 2341901}
}