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ID 14715
Eprint ID
14715
FullText URL
Thumnail 102_217.pdf 1.96 MB
Title Alternative
Radiant energy attenuation in electron beam therapy
Author
Nakagiri, Yoshitada
Yamada, Toshiharu
Sugita, Katsuhiko
Mikami, Yasutaka
Ohkawa, Yoshihiro
Inamura, Kenji
Oguri, Nobuhiro
Nagaya, Isao
Noriyasu, Toshiaki
Okazaki, Yoshio
Inoue, Nobuhiro
Togami, Izumi
Hiraki, Yoshio
Abstract
The declerator and bolus, which reduce radiant energy in electron beam radiotherapy, were investigated with respect to the interrelation between their quality of material, thickness and position, and the mean energy anf depth-dose rate curve pattern. The data obtained indicated that an acryl decelerator fitted to the tube aperture had the disadvantage of entailing bremsstrahlung x-ray intervention as well as increased depth dose. An elastomeric bolus placed on the phantom surface, however, resulted in an increase surface dose and minmal x-ray intervention. When radiation was performed with the phantom surface held apart from the bolus, a build-up phenomenon occurred on the phantom surface with a consequent diminution of surface dose. It was concluded that a bolus is more effective than a decelerator fitted to the tube aperture for attenuation of radiant energy. It is more advantageus to irradite with the bolus in contact with the skin in cases in which the target is localized in the superficial layer of the skin, and with the bolus apart from the skin in cases in which the target is situated deeper below the skin.
Keywords
電子線
エネルギー低減
浅在性腫瘍
決定臓器の保護
Published Date
1990-02
Publication Title
岡山医学会雑誌
Publication Title Alternative
Journal of Okayama Medical Association
Volume
volume102
Issue
issue1-2
Publisher
岡山医学会
Publisher Alternative
Okayama Medical Association
Start Page
217
End Page
225
ISSN
0030-1558
NCID
AN00032489
Content Type
Journal Article
Official Url
https://www.jstage.jst.go.jp/article/joma1947/102/1-2/102_1-2_217/_article/-char/ja/
Related Url
http://www.okayama-u.ac.jp/user/oma/index.html
language
日本語
Copyright Holders
岡山医学会
File Version
publisher
Refereed
True
Eprints Journal Name
joma