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. 2020 Sep 11;25:29–36. doi: 10.1016/j.ctro.2020.09.001

Table 3.

Parameters for IORT electron beam procedure in primary locally advanced rectal cancer.

IORT Parameters
Target volumen description
  • -

    Tumour residue (R0, R1, R2)

  • -

    Normal tissues exposed

  • -

    Normal tissues protected/mobilized

  • -
    Special conditions:
    • ▪
      Vascular manipulation
    • ▪
      Others
IORT factors
  • -
    Applicator size /diameter
    • ▪
      Bevelled end (degrees)
  • -
    Electron energy
    • ▪
      Isodose prescription
  • -

    Total dose

  • -
    Number of fields
    • ▪
      Report every parameter for every field
    • ▪
      Overlapping (yes / no)
    • ▪
      Field–within-a-field (description)
  • -

    Protections

  • -

    Fluid stability

  • -

    Time of beam on

  • -

    Gantry angulation

  • -

    In vivo dosimetry (system/site measured)
Integrated pre-IORT treatment factors
  • -
    Surgery: type of resection (R0, R1, R2)
    • ▪
      Quality of Total Mesorectal Excision (TME)
  • -
    Preoperative
    • ▪
      Chemoradiation (CRT) (short vs long course)
    • ▪
      Induction chemotherapy + CRT (short vs long course)
  • -
    Postoperative
    • ▪
      CRT
    • ▪
      CRT + adjuvant chemotherapy