Medical Dosimetry
Volume 35, Issue 3 , Pages 230-237 , Autumn 2010

Evaluation of Scatter Contribution and Distance Error by Iterative Methods for Strength Determination of HDR 192Ir Brachytherapy Source

  • Sudhir Kumar, M.Sc.

      Affiliations

    • Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, India
  • ,
  • Panchapakesan Srinivasan, M.Sc.

      Affiliations

    • Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai, India
  • ,
  • Sunil D. Sharma, Ph.D.

      Affiliations

    • Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, India
    • Corresponding Author InformationReprint requests to: Sunil D. Sharma, Ph.D., RP&AD, BARC, Department of Atomic Energy, CTCRS, Anushaktinagar, Mumbai, Maharashtra 400094, India
  • ,
  • Kamatam V. Subbaiah, Ph.D.

      Affiliations

    • Safety Research Institute, Atomic Energy Regulatory Board, Kalpakkam, India
  • ,
  • Yelia S. Mayya, Ph.D.

      Affiliations

    • Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, India

Received 16 February 2009 ,Accepted 18 June 2009.

References 

  1. Nath R, Anderson LL, Meli JA, et al. Code of practice for brachytherapy physics: Report of the AAPM Radiation Therapy Committee Task Group No. 56. Med. Phys. 1997;24:1557–1598
  2. Kubo HD, Glasgow GP, Pethel TD, et al. High dose rate brachytherapy treatment delivery: Report of the AAPM Radiation Therapy Committee Task Group No. 59. Med. Phys. 1998;25:375–403
  3. British Commission on Radiation Units and Measurements (BCRU). Specification of brachytherapy sources. Br. J. Rdiol. 1984;57:941–942
  4. International Commission on Radiation units and Measurements (ICRU). Radiation quantities and units (Report No. 33). 1980;
  5. International Atomic Energy Agency (IAEA). Calibration of photon and beta ray sources used in brachytherapy. Vienna: IAEA; 2002;TECDOC-1274
  6. International Atomic Energy Agency (IAEA). Calibration of brachytherapy sources. Guidelines of standardized procedures for the calibration of brachytherapy sources at secondary standard dosimetry laboratories (SSDLs) and hospitals. Vienna: IAEA; 1999;TECDOC-1079
  7. Goetsch SJ, Attix FH, Pearson DW, et al. Calibration of 192Ir high dose rate afterloading system. Med. Phys. 1991;18:462–467
  8. Stump KE, DeWerd LA, Micka JA, et al. Calibration of new high dose rate 192Ir sources. Med. Phys. 2002;29:1483–1488
  9. Selvam TP, Govinda Rajan KN, Nagarajan PS, et al. Monte Carlo aided room scatter studies in the primary air kerma strength standardization of remote afterloading 192Ir HDR source. Phys. Med. Biol. 2001;46:2299–2315
  10. Chang L, Ho SY, Chui CS, et al. Room scatter factor modelling and measurement error analysis of 192Ir HDR calibration by a Farmer chamber. Phys. Med. Biol. 2008;52:871–877
  11. Pena J, Sanchez-Doblado F, Capote R, et al. Monte Carlo correction factors for a Farmer 0.6 cm3 ion chamber dose measurement in the build-up region of the 6 MV clinical beam. Phys. Med. Biol. 2006;51:1523–1532
  12. Devan K, Aruna P, Manigandan D, et al. Evaluation of dosimetric parameters for various 192Ir brachytherapy sources under unbounded phantom geometry by Monte Carlo Simulation. Med. Dosim. 2007;32:305–315
  13. Daskalov GM, Baker RS, Rogers DWO, et al. Dosimetric modelling of the microSelectron high dose rate 192Ir source by the multigroup discrete ordinates method. Med. Phys. 2000;27:2307–2319
  14. Mainegra-Hing E, Rogers DWO. On the accuracy of techniques for obtaining the calibration coefficient Nk of 192Ir HDR brachytherapy sources. Med. Phys. 2006;33:3340–3347
  15. Bielajew AF. Correction factors for thick-walled ionization chambers in point-source photon beams. Phys. Med. Biol. 1990;35:501–516
  16. Bielajew AF. An analytical theory of the point-source non-uniformity correction factor for thick-walled ionization chambers in photon beams. Phys. Med. Biol. 1990;35:517–538
  17. Kondo S, Randolph ML. Effect of finite size of ionization chambers on measurements of small photon sources. Radiat. Res. 1960;13:37–60
  18. Sastry SS. Introductory Methods of Numerical Analysis. 2nd ed. New Delhi, India: Prentice-Hall Press; 1995;
  19. Briesmeister JF. MCNP—A General Monte Carlo N-Particle Transport Code, Version 4B, Transport Methods Group. Los Alamos National Laboratory Report. 1997;
  20. Sureka CS, Sunny SC, Subbaiah KV, et al. Dose distribution for endovascular brachytherapy using Ir-192 sources: Comparison of Monte Carlo calculations with radiochromic film measurements. Phys. Med. Biol. 2007;52:525–537
  21. Sureka CS, Aruna P, Ganesan S, et al. Computation of relative dose distribution and effective transmission around a shielded vaginal cylinder with 192Ir HDR source using MCNP4B. Med. Phys. 2006;33:1552–1561
  22. Williamson JF, Li Z. Monte Carlo aided dosimetry of microSelectron pulsed and high dose rate 192Ir sources. Med. Phys. 1995;22:809–819

PII: S0958-3947(09)00059-4

doi: 10.1016/j.meddos.2009.06.008

Medical Dosimetry
Volume 35, Issue 3 , Pages 230-237 , Autumn 2010