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Out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film

The purpose of this study is to experimentally investigate the out of field dose in the solid water phantom using Gafchromic EBT3 film. The study was carried out with 6 MV, 10 MV, 6 MeV and 15 MeV energy beams from Siemens Primus linear accelerator with constant dose rate of 200 monitor unit (MU)...

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Main Author: Salim, Nor Liyana
Format: Monograph
Language:English
Published: Universiti Sains Malaysia 2016
Subjects:
R735-854 Medical education. Medical schools. Research
RC71-78.7 Examination. Diagnosis Including raiography
Online Access:http://eprints.usm.my/61242/1/NOR%20LIYANA%20BINTI%20SALIM%20-%20e.pdf
http://eprints.usm.my/61242/
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spelling my.usm.eprints.61242 http://eprints.usm.my/61242/ Out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film Salim, Nor Liyana R735-854 Medical education. Medical schools. Research RC71-78.7 Examination. Diagnosis Including raiography The purpose of this study is to experimentally investigate the out of field dose in the solid water phantom using Gafchromic EBT3 film. The study was carried out with 6 MV, 10 MV, 6 MeV and 15 MeV energy beams from Siemens Primus linear accelerator with constant dose rate of 200 monitor unit (MU). The measurements were performed using the 30x30x15 cm solid water phantom at maximum depth dose (dmax) on 5x5 cm 10x10 cm2 and 15x15 cm2 at lateral distances up to 19 cm from the field edge. All of the percentage of out of field dose measurement were normalized at 0 cm. The results for 6 MV photon beam show approximately 0.05% , 0.07% and 0.71% of the prescribed dose outside the field while for 10 MV photon beams, 0.68%, 0.30% and 0.56% was measured respectively for 5x5 cm2,10x10 cm2 and 15x15 cm2 field size at 19 cm distance. For electron beam, an appearance of peak dose have been observed around 11 - 19 cm out of the field edge for all field sizes and energies. For 6 MeV electron beams, 4.7% of the prescribed dose appeared as highest peak dose for 5x5 cm2 at 11 cm and no peak dose was evidenced at the 10x10 cm2 and 15x15 cm2. For 15 MeV electron beams, 1.93%, 4.11% and 2.13% of the prescribed dose resulted as the out of field dose for respectively 5x5 cm2, 10x10 cm2 and 15x15 cm2. In summary, the out of field dose decrease as distance increase from the field edge and increase with increasing energy and field size for both photon and electron beams. This work can be used as the dose estimation to the organ at risk or healthy tissue outside the treatment field for cancer’s patient receiving external beam radiation as a part of treatment, as well as in studies exploring the radiotherapy long-terms effects. Universiti Sains Malaysia 2016 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/61242/1/NOR%20LIYANA%20BINTI%20SALIM%20-%20e.pdf Salim, Nor Liyana (2016) Out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film. Project Report. Universiti Sains Malaysia. (Submitted)
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic R735-854 Medical education. Medical schools. Research
RC71-78.7 Examination. Diagnosis Including raiography
spellingShingle R735-854 Medical education. Medical schools. Research
RC71-78.7 Examination. Diagnosis Including raiography
Salim, Nor Liyana
Out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film
description The purpose of this study is to experimentally investigate the out of field dose in the solid water phantom using Gafchromic EBT3 film. The study was carried out with 6 MV, 10 MV, 6 MeV and 15 MeV energy beams from Siemens Primus linear accelerator with constant dose rate of 200 monitor unit (MU). The measurements were performed using the 30x30x15 cm solid water phantom at maximum depth dose (dmax) on 5x5 cm 10x10 cm2 and 15x15 cm2 at lateral distances up to 19 cm from the field edge. All of the percentage of out of field dose measurement were normalized at 0 cm. The results for 6 MV photon beam show approximately 0.05% , 0.07% and 0.71% of the prescribed dose outside the field while for 10 MV photon beams, 0.68%, 0.30% and 0.56% was measured respectively for 5x5 cm2,10x10 cm2 and 15x15 cm2 field size at 19 cm distance. For electron beam, an appearance of peak dose have been observed around 11 - 19 cm out of the field edge for all field sizes and energies. For 6 MeV electron beams, 4.7% of the prescribed dose appeared as highest peak dose for 5x5 cm2 at 11 cm and no peak dose was evidenced at the 10x10 cm2 and 15x15 cm2. For 15 MeV electron beams, 1.93%, 4.11% and 2.13% of the prescribed dose resulted as the out of field dose for respectively 5x5 cm2, 10x10 cm2 and 15x15 cm2. In summary, the out of field dose decrease as distance increase from the field edge and increase with increasing energy and field size for both photon and electron beams. This work can be used as the dose estimation to the organ at risk or healthy tissue outside the treatment field for cancer’s patient receiving external beam radiation as a part of treatment, as well as in studies exploring the radiotherapy long-terms effects.
format Monograph
author Salim, Nor Liyana
author_facet Salim, Nor Liyana
author_sort Salim, Nor Liyana
title Out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film
title_short Out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film
title_full Out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film
title_fullStr Out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film
title_full_unstemmed Out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film
title_sort out-of-field dosimetry on photon and electron beam using gafchromic ebt3 film
publisher Universiti Sains Malaysia
publishDate 2016
url http://eprints.usm.my/61242/1/NOR%20LIYANA%20BINTI%20SALIM%20-%20e.pdf
http://eprints.usm.my/61242/
_version_ 1817842961904304128
score 13.223943

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