Dependence of radiochromic film response kinetics on fractionated doses

I. Ali, J. F. Williamson, C. Costescu, J. F. Dempsey

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Because the rate and magnitude of the post-exposure growth of the MD-55 radiochromic film (RCF) dosimeter response depends significantly on total dose, we have investigated the influence of fractionation and protracted dose delivery on optical density (OD) as a function of total dose and the exposure-to-densitometry time interval for a 633-nm scanning laser densitometer. Both measurements and models demonstrate that fractionation induces transient OD over responses, which can be as large as 20%, but rapidly dissipate within 24 h. However, the superposition model predicts 2-5% over responses that persist as long as 700 h.

Original languageEnglish
Pages (from-to)609-617
Number of pages9
JournalApplied Radiation and Isotopes
Issue number4
StatePublished - Apr 2005


  • Brachytherapy
  • Dose-time-fractionation effects
  • Dosimetry
  • Radiochromic film


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