Radiochromic film dosimetry of HDR (192)Ir source radiation fields.

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  • Additional Information
    • Source:
      Publisher: John Wiley and Sons, Inc Country of Publication: United States NLM ID: 0425746 Publication Model: Print Cited Medium: Print ISSN: 0094-2405 (Print) Linking ISSN: 00942405 NLM ISO Abbreviation: Med Phys Subsets: MEDLINE
    • Publication Information:
      Publication: 2017- : Hoboken, NJ : John Wiley and Sons, Inc.
      Original Publication: Lancaster, Pa., Published for the American Assn. of Physicists in Medicine by the American Institute of Physics.
    • Subject Terms:
      Film Dosimetry/*methods ; Iridium Radioisotopes/*therapeutic use ; Radiotherapy/*methods; Humans ; Image Processing, Computer-Assisted ; Phantoms, Imaging ; Uncertainty
    • Abstract:
      Purpose: A radiochromic film based dosimetry system for high dose rate (HDR) Iridium-192 brachytherapy source was described. A comparison between calibration curves established in water and Solid Water™ was provided.
      Methods: Pieces of EBT-2 model GAFCHROMIC™ film were irradiated in both water and Solid Water™ with HDR (192)Ir brachytherapy source in a dose range from 0 to 50 Gy. Responses of EBT-2 GAFCHROMIC™ film were compared for irradiations in water and Solid Water™ by scaling the dose between media through Monte Carlo calculated conversion factor for both setups. To decrease uncertainty in dose delivery due to positioning of the film piece with respect to the radiation source, traceable calibration irradiations were performed in a parallel-opposed beam setup.
      Results: The EBT-2 GAFCHROMIC™ film based dosimetry system described in this work can provide an overall one-sigma dose uncertainty of 4.12% for doses above 1 Gy. The ratio of dose delivered to the sensitive layer of the film in water to the dose delivered to the sensitive layer of the film in Solid Water™ was calculated using Monte Carlo simulations to be 0.9941 ± 0.0007.
      Conclusions: A radiochromic film based dosimetry system using only the green color channel of a flatbed document scanner showed superior precision if used alone in a dose range that extends up to 50 Gy, which greatly decreases the complexity of work. In addition, Solid Water™ material was shown to be a viable alternative to water in performing radiochromic film based dosimetry with HDR (192)Ir brachytherapy sources.
    • Accession Number:
      0 (Iridium Radioisotopes)
    • Publication Date:
      Date Created: 20111104 Date Completed: 20120118 Latest Revision: 20220317
    • Publication Date:
      20240829
    • Accession Number:
      10.1118/1.3651482
    • Accession Number:
      22047372