Dosimetry of very high energy electrons (VHEE) for radiotherapy applications: using radiochromic film measurements and Monte Carlo simulations

Anna Subiel, V. Moskvin, Gregor H. Welsh, Silvia Cipiccia, David Reboredo Gil, P. Evans, M. Partridge, C. Desrosiers, Maria Pia Anania, A. Cianchi, A. Mostacci, E. Chiadroni, D. Di Giovenale, F. Villa, R. Pompili, M. Ferrario, M. Bellaveglia, G. Di Pirro, G. Gatti, C. Vaccarezza & 10 others Bjorn Seitz, Riju Issac, Enrico Brunetti, Mark Wiggins, Bernhard Ersfeld, Mohammad Islam, M.S. Mendonca, Annette Sorensen, Marie Boyd, Dino Jaroszynski

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Very high energy electrons (VHEE) in the range from 100-250 MeV have the potential of becoming an alternative modality in radiotherapy because of their improved dosimetry properties compared with MV photons from contemporary medical linear accelerators. Due to the need for accurate dosimetry of small field size VHEE beams we have performed dose measurements using EBT2 Gafchromic® film. Calibration of the film has been carried out for beams of two different energy ranges: 20 MeV and 165 MeV from conventional radio frequency linear accelerators. In addition, EBT2 film has been used for dose measurements with 135 MeV electron beams produced by a laser-plasma wakefield accelerator. The dose response measurements and percentage depth dose profiles have been compared with calculations carried out using the general-purpose FLUKA Monte Carlo (MC) radiation transport code. The impact of induced radioactivity on film response for VHEEs has been evaluated using the MC simulations. A neutron yield of the order of 10-5 neutrons cm-2 per incident electron has been estimated and induced activity due to radionuclide production is found to have a negligible effect on total dose deposition and film response. Neutron and proton contribution to the equivalent doses are negligible for VHEE. The study demonstrates that EBT2 Gafchromic film is a reliable dosimeter that can be used for dosimetry of VHEE. The results indicate an energy-independent response of the dosimeter for 20 MeV and 165 MeV electron beams and has been found to be suitable for dosimetry of VHEE.

LanguageEnglish
Pages5811–5829
Number of pages19
JournalPhysics in Medicine and Biology
Volume59
Issue number19
Early online date10 Sep 2014
DOIs
Publication statusPublished - 7 Oct 2014

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High-Energy Radiotherapy
Electrons
Neutrons
Particle Accelerators
Radio
Photons
Radioisotopes
Radioactivity
Calibration
Protons
Lasers
Radiotherapy
Radiation

Keywords

  • Monte Carlo method
  • simulation
  • electron beams
  • radiotherapy applications

Cite this

Subiel, Anna ; Moskvin, V. ; Welsh, Gregor H. ; Cipiccia, Silvia ; Reboredo Gil, David ; Evans, P. ; Partridge, M. ; Desrosiers, C. ; Anania, Maria Pia ; Cianchi, A. ; Mostacci, A. ; Chiadroni, E. ; Di Giovenale, D. ; Villa, F. ; Pompili, R. ; Ferrario, M. ; Bellaveglia, M. ; Di Pirro, G. ; Gatti, G. ; Vaccarezza, C. ; Seitz, Bjorn ; Issac, Riju ; Brunetti, Enrico ; Wiggins, Mark ; Ersfeld, Bernhard ; Islam, Mohammad ; Mendonca, M.S. ; Sorensen, Annette ; Boyd, Marie ; Jaroszynski, Dino. / Dosimetry of very high energy electrons (VHEE) for radiotherapy applications : using radiochromic film measurements and Monte Carlo simulations. In: Physics in Medicine and Biology. 2014 ; Vol. 59, No. 19. pp. 5811–5829.
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Subiel, A, Moskvin, V, Welsh, GH, Cipiccia, S, Reboredo Gil, D, Evans, P, Partridge, M, Desrosiers, C, Anania, MP, Cianchi, A, Mostacci, A, Chiadroni, E, Di Giovenale, D, Villa, F, Pompili, R, Ferrario, M, Bellaveglia, M, Di Pirro, G, Gatti, G, Vaccarezza, C, Seitz, B, Issac, R, Brunetti, E, Wiggins, M, Ersfeld, B, Islam, M, Mendonca, MS, Sorensen, A, Boyd, M & Jaroszynski, D 2014, 'Dosimetry of very high energy electrons (VHEE) for radiotherapy applications: using radiochromic film measurements and Monte Carlo simulations' Physics in Medicine and Biology, vol. 59, no. 19, pp. 5811–5829. https://doi.org/10.1088/0031-9155/59/19/5811

Dosimetry of very high energy electrons (VHEE) for radiotherapy applications : using radiochromic film measurements and Monte Carlo simulations. / Subiel, Anna; Moskvin, V.; Welsh, Gregor H.; Cipiccia, Silvia; Reboredo Gil, David; Evans, P.; Partridge, M.; Desrosiers, C.; Anania, Maria Pia; Cianchi, A.; Mostacci, A.; Chiadroni, E.; Di Giovenale, D.; Villa, F.; Pompili, R.; Ferrario, M.; Bellaveglia, M.; Di Pirro, G.; Gatti, G.; Vaccarezza, C.; Seitz, Bjorn; Issac, Riju; Brunetti, Enrico; Wiggins, Mark; Ersfeld, Bernhard; Islam, Mohammad; Mendonca, M.S.; Sorensen, Annette; Boyd, Marie; Jaroszynski, Dino.

In: Physics in Medicine and Biology, Vol. 59, No. 19, 07.10.2014, p. 5811–5829.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dosimetry of very high energy electrons (VHEE) for radiotherapy applications

T2 - Physics in Medicine and Biology

AU - Subiel, Anna

AU - Moskvin, V.

AU - Welsh, Gregor H.

AU - Cipiccia, Silvia

AU - Reboredo Gil, David

AU - Evans, P.

AU - Partridge, M.

AU - Desrosiers, C.

AU - Anania, Maria Pia

AU - Cianchi, A.

AU - Mostacci, A.

AU - Chiadroni, E.

AU - Di Giovenale, D.

AU - Villa, F.

AU - Pompili, R.

AU - Ferrario, M.

AU - Bellaveglia, M.

AU - Di Pirro, G.

AU - Gatti, G.

AU - Vaccarezza, C.

AU - Seitz, Bjorn

AU - Issac, Riju

AU - Brunetti, Enrico

AU - Wiggins, Mark

AU - Ersfeld, Bernhard

AU - Islam, Mohammad

AU - Mendonca, M.S.

AU - Sorensen, Annette

AU - Boyd, Marie

AU - Jaroszynski, Dino

PY - 2014/10/7

Y1 - 2014/10/7

N2 - Very high energy electrons (VHEE) in the range from 100-250 MeV have the potential of becoming an alternative modality in radiotherapy because of their improved dosimetry properties compared with MV photons from contemporary medical linear accelerators. Due to the need for accurate dosimetry of small field size VHEE beams we have performed dose measurements using EBT2 Gafchromic® film. Calibration of the film has been carried out for beams of two different energy ranges: 20 MeV and 165 MeV from conventional radio frequency linear accelerators. In addition, EBT2 film has been used for dose measurements with 135 MeV electron beams produced by a laser-plasma wakefield accelerator. The dose response measurements and percentage depth dose profiles have been compared with calculations carried out using the general-purpose FLUKA Monte Carlo (MC) radiation transport code. The impact of induced radioactivity on film response for VHEEs has been evaluated using the MC simulations. A neutron yield of the order of 10-5 neutrons cm-2 per incident electron has been estimated and induced activity due to radionuclide production is found to have a negligible effect on total dose deposition and film response. Neutron and proton contribution to the equivalent doses are negligible for VHEE. The study demonstrates that EBT2 Gafchromic film is a reliable dosimeter that can be used for dosimetry of VHEE. The results indicate an energy-independent response of the dosimeter for 20 MeV and 165 MeV electron beams and has been found to be suitable for dosimetry of VHEE.

AB - Very high energy electrons (VHEE) in the range from 100-250 MeV have the potential of becoming an alternative modality in radiotherapy because of their improved dosimetry properties compared with MV photons from contemporary medical linear accelerators. Due to the need for accurate dosimetry of small field size VHEE beams we have performed dose measurements using EBT2 Gafchromic® film. Calibration of the film has been carried out for beams of two different energy ranges: 20 MeV and 165 MeV from conventional radio frequency linear accelerators. In addition, EBT2 film has been used for dose measurements with 135 MeV electron beams produced by a laser-plasma wakefield accelerator. The dose response measurements and percentage depth dose profiles have been compared with calculations carried out using the general-purpose FLUKA Monte Carlo (MC) radiation transport code. The impact of induced radioactivity on film response for VHEEs has been evaluated using the MC simulations. A neutron yield of the order of 10-5 neutrons cm-2 per incident electron has been estimated and induced activity due to radionuclide production is found to have a negligible effect on total dose deposition and film response. Neutron and proton contribution to the equivalent doses are negligible for VHEE. The study demonstrates that EBT2 Gafchromic film is a reliable dosimeter that can be used for dosimetry of VHEE. The results indicate an energy-independent response of the dosimeter for 20 MeV and 165 MeV electron beams and has been found to be suitable for dosimetry of VHEE.

KW - Monte Carlo method

KW - simulation

KW - electron beams

KW - radiotherapy applications

UR - http://www.scopus.com/inward/record.url?scp=84907210236&partnerID=8YFLogxK

U2 - 10.1088/0031-9155/59/19/5811

DO - 10.1088/0031-9155/59/19/5811

M3 - Article

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SP - 5811

EP - 5829

JO - Physics in Medicine and Biology

JF - Physics in Medicine and Biology

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