Cover Image

Determination of effective source to surface distance for electron beam from siemens primus linear accelerator

The aim of this thesis is to determine the effective source surface distance for 6, 9 and 15 MeV electron beam energies generated from Siemens Primus linear accelerator in HUSM. The effective SSD is the distance from the virtual source position to the end of the applicator. The effective SSD is k...

Full description

Saved in:
Bibliographic Details
Main Author: Ping, Heng Siew
Format: Thesis
Language:English
Published: 2004
Subjects:
R Medicine
Online Access:http://eprints.usm.my/44227/1/LI...Heng%20Seiw%20Ping...2004...-24%20pages.pdf
http://eprints.usm.my/44227/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.usm.eprints.44227
record_format eprints
spelling my.usm.eprints.44227 http://eprints.usm.my/44227/ Determination of effective source to surface distance for electron beam from siemens primus linear accelerator Ping, Heng Siew R Medicine The aim of this thesis is to determine the effective source surface distance for 6, 9 and 15 MeV electron beam energies generated from Siemens Primus linear accelerator in HUSM. The effective SSD is the distance from the virtual source position to the end of the applicator. The effective SSD is known to depend on beam energy and field size. Different methods of obtaining the effective source surface distance for electron beams have been investigated. The charge measurements were performed using parallel plate ionization chamber in solid water phantom at depth of dmax, using 0, 5, 10 and 15cm air gap. Excel was used to present a plot of [QJQ8 ] 112 versus air gap. The variation of the effective SSD with the energy and field size of measurement was also investigated. Minimum effective SSD was 58.3 em in small field size of 5 em diameter circle applicator and maximum effective SSD was 98.2 em for 25x25 cm2 applicator, with 6 MeV energy. Effective SSDs gradually increased with field size for the same electron energy and decreased again at 25x25cm2 for 6 and 9MeV. Effective SSDs gradually increased with the electron energies. From the results we recommended that the effective SSD should be measured for each energy and field size before clinical use. 2004 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/44227/1/LI...Heng%20Seiw%20Ping...2004...-24%20pages.pdf Ping, Heng Siew (2004) Determination of effective source to surface distance for electron beam from siemens primus linear accelerator. Masters thesis, Universiti Sains Malaysia.
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 R Medicine
spellingShingle R Medicine
Ping, Heng Siew
Determination of effective source to surface distance for electron beam from siemens primus linear accelerator
description The aim of this thesis is to determine the effective source surface distance for 6, 9 and 15 MeV electron beam energies generated from Siemens Primus linear accelerator in HUSM. The effective SSD is the distance from the virtual source position to the end of the applicator. The effective SSD is known to depend on beam energy and field size. Different methods of obtaining the effective source surface distance for electron beams have been investigated. The charge measurements were performed using parallel plate ionization chamber in solid water phantom at depth of dmax, using 0, 5, 10 and 15cm air gap. Excel was used to present a plot of [QJQ8 ] 112 versus air gap. The variation of the effective SSD with the energy and field size of measurement was also investigated. Minimum effective SSD was 58.3 em in small field size of 5 em diameter circle applicator and maximum effective SSD was 98.2 em for 25x25 cm2 applicator, with 6 MeV energy. Effective SSDs gradually increased with field size for the same electron energy and decreased again at 25x25cm2 for 6 and 9MeV. Effective SSDs gradually increased with the electron energies. From the results we recommended that the effective SSD should be measured for each energy and field size before clinical use.
format Thesis
author Ping, Heng Siew
author_facet Ping, Heng Siew
author_sort Ping, Heng Siew
title Determination of effective source to surface distance for electron beam from siemens primus linear accelerator
title_short Determination of effective source to surface distance for electron beam from siemens primus linear accelerator
title_full Determination of effective source to surface distance for electron beam from siemens primus linear accelerator
title_fullStr Determination of effective source to surface distance for electron beam from siemens primus linear accelerator
title_full_unstemmed Determination of effective source to surface distance for electron beam from siemens primus linear accelerator
title_sort determination of effective source to surface distance for electron beam from siemens primus linear accelerator
publishDate 2004
url http://eprints.usm.my/44227/1/LI...Heng%20Seiw%20Ping...2004...-24%20pages.pdf
http://eprints.usm.my/44227/
_version_ 1681490150896435200
score 13.211869

Similar Items