To cite espadon in publications use:

Fontbonne C, Fontbonne J (2022). espadon: Easy Study of Patient DICOM Data in Oncology: toolbox for automation, exploitation and processing of DICOM files and images. R package version 1.1.1.

Corresponding BibTeX entry:

  @Manual{,
    title = {{espadon}: Easy Study of Patient DICOM Data in Oncology:
      toolbox for automation, exploitation and processing of DICOM
      files and images},
    author = {Cathy Fontbonne and Jean-Marc Fontbonne},
    institution = {Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC
      Caen, 14000 Caen, France},
    year = {2022},
    note = {R package version 1.1.1},
  }