Kestabilan Pekali Kalibrasi Dos Terserap Terhadap Air, ND,w Untuk Kebuk Pengionan Tahap Terapi Kepunyaan Pusat Radioterapi Tempatan

Analisis Keputusan Yang Diperoleh Sepanjang 2004-2010

Translated title of the contribution: Stability of the absorbed dose to water calibration coefficient, ND,w for therapy level ionization chambers belonging to local radiotherapy centres: Analysis of results obtained during 2004 -2010

Supian Samat, W. Priharti, S. S. Chong, T. Kadni, M. T. Dolah

Research output: Contribution to journalArticle

Abstract

According to the IAEA, the calibration of therapy level ionization chambers in terms of absorbed dose to water calibration coefficient, ND,w must be within ± 1.5% acceptance limit. This is for the purpose of getting accurate absorbed dose for the patient undergoing radiotherapy treatment. The objective of this work is to evaluate the deviation of ND,w for 29 chambers belonging to 16 local radiotherapy centres. Eight types of chambers have been calibrated at the SSDL Laboratory of Malaysian Nuclear Agency for the period of seven years. The mean μ of the ND,w deviation together with its standard error (SE) and standard deviation σN-1 were calculated. It is found that out of 29 chambers, 26 chambers yielded μ ± SE within the permitted value of ± 1.5%. For the other three chambers, despite their values of μ ± SE lie slightly outside the range of ± 1.5%, they are still within the 95% confident interval of the ± 1.5%. It is concluded that the ND,w of the chambers belonging to the local radiotherapy chambers are stable in their performance the dose to the patients measurement.

Original languageUndefined/Unknown
Pages (from-to)142-147
Number of pages6
JournalMalaysian Journal of Analytical Sciences
Volume16
Issue number2
Publication statusPublished - 2012

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Ionization chambers
Radiotherapy
Dosimetry
Calibration
Water

Keywords

  • Absorbed dose to water calibration coefficient N
  • Local radiotherapy centres
  • Percentage deviation
  • SSDL malaysia
  • Stability of N

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

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title = "Kestabilan Pekali Kalibrasi Dos Terserap Terhadap Air, ND,w Untuk Kebuk Pengionan Tahap Terapi Kepunyaan Pusat Radioterapi Tempatan: Analisis Keputusan Yang Diperoleh Sepanjang 2004-2010",
abstract = "According to the IAEA, the calibration of therapy level ionization chambers in terms of absorbed dose to water calibration coefficient, ND,w must be within ± 1.5{\%} acceptance limit. This is for the purpose of getting accurate absorbed dose for the patient undergoing radiotherapy treatment. The objective of this work is to evaluate the deviation of ND,w for 29 chambers belonging to 16 local radiotherapy centres. Eight types of chambers have been calibrated at the SSDL Laboratory of Malaysian Nuclear Agency for the period of seven years. The mean μ of the ND,w deviation together with its standard error (SE) and standard deviation σN-1 were calculated. It is found that out of 29 chambers, 26 chambers yielded μ ± SE within the permitted value of ± 1.5{\%}. For the other three chambers, despite their values of μ ± SE lie slightly outside the range of ± 1.5{\%}, they are still within the 95{\%} confident interval of the ± 1.5{\%}. It is concluded that the ND,w of the chambers belonging to the local radiotherapy chambers are stable in their performance the dose to the patients measurement.",
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author = "Supian Samat and W. Priharti and Chong, {S. S.} and T. Kadni and Dolah, {M. T.}",
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T2 - Analisis Keputusan Yang Diperoleh Sepanjang 2004-2010

AU - Samat, Supian

AU - Priharti, W.

AU - Chong, S. S.

AU - Kadni, T.

AU - Dolah, M. T.

PY - 2012

Y1 - 2012

N2 - According to the IAEA, the calibration of therapy level ionization chambers in terms of absorbed dose to water calibration coefficient, ND,w must be within ± 1.5% acceptance limit. This is for the purpose of getting accurate absorbed dose for the patient undergoing radiotherapy treatment. The objective of this work is to evaluate the deviation of ND,w for 29 chambers belonging to 16 local radiotherapy centres. Eight types of chambers have been calibrated at the SSDL Laboratory of Malaysian Nuclear Agency for the period of seven years. The mean μ of the ND,w deviation together with its standard error (SE) and standard deviation σN-1 were calculated. It is found that out of 29 chambers, 26 chambers yielded μ ± SE within the permitted value of ± 1.5%. For the other three chambers, despite their values of μ ± SE lie slightly outside the range of ± 1.5%, they are still within the 95% confident interval of the ± 1.5%. It is concluded that the ND,w of the chambers belonging to the local radiotherapy chambers are stable in their performance the dose to the patients measurement.

AB - According to the IAEA, the calibration of therapy level ionization chambers in terms of absorbed dose to water calibration coefficient, ND,w must be within ± 1.5% acceptance limit. This is for the purpose of getting accurate absorbed dose for the patient undergoing radiotherapy treatment. The objective of this work is to evaluate the deviation of ND,w for 29 chambers belonging to 16 local radiotherapy centres. Eight types of chambers have been calibrated at the SSDL Laboratory of Malaysian Nuclear Agency for the period of seven years. The mean μ of the ND,w deviation together with its standard error (SE) and standard deviation σN-1 were calculated. It is found that out of 29 chambers, 26 chambers yielded μ ± SE within the permitted value of ± 1.5%. For the other three chambers, despite their values of μ ± SE lie slightly outside the range of ± 1.5%, they are still within the 95% confident interval of the ± 1.5%. It is concluded that the ND,w of the chambers belonging to the local radiotherapy chambers are stable in their performance the dose to the patients measurement.

KW - Absorbed dose to water calibration coefficient N

KW - Local radiotherapy centres

KW - Percentage deviation

KW - SSDL malaysia

KW - Stability of N

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