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Evaluation of Wall Correction Factor of INER's Air-Kerma Primary Standard Chamber and Dose Variation by Source Displacement for HDR (192)Ir Brachytherapy.

The aim of the present study was to estimate the wall effect of the self-made spherical graphite-walled cavity chamber with the Monte Carlo method for establishing the air-kerma primary standard of high-dose-rate (HDR) ¹¿²Ir brachytherapy sources at the Institute of Nuclear Energy Research (INER, Ta...

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Published in:BioMed Research International Vol. 2013; pp. 436979 - 436980
Main Authors: Lee, J H, Wang, J N, Huang, T T, Su, S H, Chang, B J, Su, C H, Hsu, S M
Format: Journal Article
Published: Wiley-Blackwell 2013
Online Access:View this record in EBSCOhost
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      jtl: BioMed Research International
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      dt: 2013
      vid: 2013
      pid: 480
      pub: Wiley-Blackwell
      place: Malden, Massachusetts
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        atl: Evaluation of Wall Correction Factor of INER's Air-Kerma Primary Standard Chamber and Dose Variation by Source Displacement for HDR (192)Ir Brachytherapy.
      aug:
        au:
          Lee, J H
          Wang, J N
          Huang, T T
          Su, S H
          Chang, B J
          Su, C H
          Hsu, S M
        affil: Health Physics Division, Institute of Nuclear Energy Research, Longtan 325, Taiwan.
      sug:
        subj:
          Brachytherapy Methods
          Radioisotopes
          Radiation Dosage
          Air
          Systems Analysis
          Phantoms, Imaging
          Taiwan
      ab: The aim of the present study was to estimate the wall effect of the self-made spherical graphite-walled cavity chamber with the Monte Carlo method for establishing the air-kerma primary standard of high-dose-rate (HDR) ¹¿²Ir brachytherapy sources at the Institute of Nuclear Energy Research (INER, Taiwan). The Monte Carlo method established in this paper was also employed to respectively simulate wall correction factors of the ¹¿²Ir air-kerma standard chambers used at the National Institute of Standards and Technology (NIST, USA) and the National Physical Laboratory (NPL, UK) for comparisons and verification. The chamber wall correction calculation results will be incorporated into INER's HDR ¹¿²Ir primary standard in the future. For the brachytherapy treatment in the esophagus or in the bronchi, the position of the isotope may have displacement in the cavity. Thus the delivered dose would differ from the prescribed dose in the treatment plan. We also tried assessing dose distribution due to the position displacement of HDR ¹¿²Ir brachytherapy source in a phantom with a central cavity by the Monte Carlo method. The calculated results could offer a clinical reference for the brachytherapy within the human organs with cavity.
      pubtype: Academic Journal
      doctype: Journal Article
      ougenre: Article
    language: English
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