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Perturbation correction factors for some ionization chambres commonly applied in electron-beams

F Wittkamper, Hubert Thierens UGent, Ann Van Der Plaetsen, Carlos De Wagter UGent and B Mijnheer (1991) PHYSICS IN MEDICINE AND BIOLOGY. 36(12). p.1639-1652
abstract
Values for the fluence perturbation correction factor were determined in a number of electron beams for the commonly applied PTW/Markus plane-parallel chamber and the cylindrical NE 2571 Farmer chamber. These data were determined relative to the NACP plane-parallel chamber as a function of the mean energy at depth, E(z)BAR, calculated according to the method recommended in modern dosimetry protocols. For the cylindrical chamber the results are in agreement with the data recommended in these protocols. For the PTW/Markus chamber a small but significant fluence perturbation correction is necessary: up to about 3% for a value of E(z)BAR = 2 MeV. In order to check the value of these fluence perturbation correction values, dose measurements were performed ionometrically and compared with values determined with the Fricke dosimetry system. The ratio of dose values determined with the NACP and PTW/Markus chambers, applying the NCS Code of Practice and dose values determined with the Fricke dosimetry system, was 1.007 +/- 0.5% on the average for a number of electron beams. This result is in agreement with the conclusions of other investigators if for the Fricke dosimeter system a value of 352 10(-6) m-2 kg-1 Gy-1 for epsilon(m)G is applied.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
FRICKE, WATER, PROTOCOL, FERROUS SULFATE DOSIMETER, HIGH-ENERGY PHOTON
journal title
PHYSICS IN MEDICINE AND BIOLOGY
Phys. Med. Biol.
volume
36
issue
12
pages
1639 - 1652
Web of Science type
Article
ISSN
0031-9155
DOI
10.1088/0031-9155/36/12/008
language
English
UGent publication?
yes
classification
A1
id
229349
handle
http://hdl.handle.net/1854/LU-229349
date created
2004-05-24 13:24:00
date last changed
2016-12-19 15:38:50
@article{229349,
  abstract     = {Values for the fluence perturbation correction factor were determined in a number of electron beams for the commonly applied PTW/Markus plane-parallel chamber and the cylindrical NE 2571 Farmer chamber. These data were determined relative to the NACP plane-parallel chamber as a function of the mean energy at depth, E(z)BAR, calculated according to the method recommended in modern dosimetry protocols. For the cylindrical chamber the results are in agreement with the data recommended in these protocols. For the PTW/Markus chamber a small but significant fluence perturbation correction is necessary: up to about 3\% for a value of E(z)BAR = 2 MeV. In order to check the value of these fluence perturbation correction values, dose measurements were performed ionometrically and compared with values determined with the Fricke dosimetry system. The ratio of dose values determined with the NACP and PTW/Markus chambers, applying the NCS Code of Practice and dose values determined with the Fricke dosimetry system, was 1.007 +/- 0.5\% on the average for a number of electron beams. This result is in agreement with the conclusions of other investigators if for the Fricke dosimeter system a value of 352 10(-6) m-2 kg-1 Gy-1 for epsilon(m)G is applied.},
  author       = {Wittkamper, F and Thierens, Hubert and Van Der Plaetsen, Ann and De Wagter, Carlos and Mijnheer, B},
  issn         = {0031-9155},
  journal      = {PHYSICS IN MEDICINE AND BIOLOGY},
  keyword      = {FRICKE,WATER,PROTOCOL,FERROUS SULFATE DOSIMETER,HIGH-ENERGY PHOTON},
  language     = {eng},
  number       = {12},
  pages        = {1639--1652},
  title        = {Perturbation correction factors for some ionization chambres commonly applied in electron-beams},
  url          = {http://dx.doi.org/10.1088/0031-9155/36/12/008},
  volume       = {36},
  year         = {1991},
}

Chicago
Wittkamper, F, Hubert Thierens, Ann Van Der Plaetsen, Carlos De Wagter, and B Mijnheer. 1991. “Perturbation Correction Factors for Some Ionization Chambres Commonly Applied in Electron-beams.” Physics in Medicine and Biology 36 (12): 1639–1652.
APA
Wittkamper, F., Thierens, H., Van Der Plaetsen, A., De Wagter, C., & Mijnheer, B. (1991). Perturbation correction factors for some ionization chambres commonly applied in electron-beams. PHYSICS IN MEDICINE AND BIOLOGY, 36(12), 1639–1652.
Vancouver
1.
Wittkamper F, Thierens H, Van Der Plaetsen A, De Wagter C, Mijnheer B. Perturbation correction factors for some ionization chambres commonly applied in electron-beams. PHYSICS IN MEDICINE AND BIOLOGY. 1991;36(12):1639–52.
MLA
Wittkamper, F, Hubert Thierens, Ann Van Der Plaetsen, et al. “Perturbation Correction Factors for Some Ionization Chambres Commonly Applied in Electron-beams.” PHYSICS IN MEDICINE AND BIOLOGY 36.12 (1991): 1639–1652. Print.