To cite espadon in publications use:

Fontbonne C., Fontbonne J.M., Azemar N. Espadon, an R package for automation, exploitation and processing of DICOM files in medical physics and clinical research. Phys Med 2023;109:102580, <10.1016/j.ejmp.2023.102580>.

Corresponding BibTeX entry:

  @Article{,
    title = {Espadon, an R package for automation, exploitation and
      processing of DICOM files in medical physics and clinical
      research},
    author = {Cathy Fontbonne and Jean-Marc Fontbonne and Nathan
      Azemar},
    journal = {Physica Medica},
    year = {2023},
    volume = {109},
    number = {8},
    pages = {102580},
    doi = {10.1016/j.ejmp.2023.102580},
  }