@misc{indiciaefb949d380418,
  title = {An electron density calibration phantom for CT-based treatment planning computers.},
  author = {C Constantinou and J C Harrington and L A DeWerd},
  doi = {10.1118/1.596862},
  url = {https://pubmed.ncbi.nlm.nih.gov/1584125/},
  note = {Source identifier: 1584125}
}