Skin-sparing reduction effects of thermoplastics used for patient immobilization in head and neck radiotherapy

Claudio Fiorino, Giovanni Mauro Cattaneo, Antonella Del Vecchio, Marcello Fusca, Barbara Longobardi, Patrizia Signorotto, Riccardo Calandrino

Research output: Contribution to journalArticlepeer-review

Abstract

Skin-sparing benefits derived from the use of megavoltage photon beams can be strongly reduced when filters are inserted between the source and the patient. The use of plastic masks for immobilizing the patient is the most important cause of this reduction in head and neck treatments. The influence of thermoplastics, commercially available for patient immobilization systems (Orfit Raycast (Luxilon Ind. Co.), Posicast (Sinmed bv) and Optimold (WFR Aquaplast Corp.)), on the patient skin dose value has been investigated by using an NE2534 'Markus' chamber. Indicative measurements with moulded masks (carried out with 2-mm Orfit and3.2-mm Optimold layers) show significant differences between masks moulded with the two thermoplastics.

Original languageEnglish
Pages (from-to)267-270
Number of pages4
JournalRadiotherapy and Oncology
Volume30
Issue number3
DOIs
Publication statusPublished - 1994

Keywords

  • Buildup
  • Head and neck tumors
  • Plastic immobilization masks
  • Skin dose

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Urology

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