Dose distribution measurement of clinical proton beams with an imaging plate

Akihiro Nohtomi, T. Sakae, T. Tenmuma, Y. Tsunashima, Y. Hayakawa

Research output: Contribution to journalArticle

Abstract

For an application to the dose-distribution measurement, response of an imaging plate (IP) has been studied with proton beams which are utilized for the radiation therapy. The upper limit of measurable proton dose by the IP system is almost controlled by the readout range of the scanner used. Within this limit, reasonable linear response of an IP to proton dose to water is maintained. Reproducibility of the PSL intensity is fairly good if both the fading characteristics and the lot-dependence of the sensitivity of each IP are taken into account carefully. Stopping power dependence of IP response has been found to be unnegligible for the precise dose evaluation. Following this, in order to examine the resultant radiation damage by proton irradiation, an IP was excessively irradiated by 250 MeV protons. Notable deterioration of PSL signal was found for the fluence more than 5 × 10 12 protons/cm 2. Next, by using an IP, we have developed a simple and novel method of the 2-dimensional dose-distribution measurement. The effectiveness of this method is demonstrated by a comparison between the measurement and the dose-distribution calculated by a new model.

Original languageEnglish
Article numberN16-118
Pages (from-to)695-697
Number of pages3
JournalIEEE Nuclear Science Symposium Conference Record
Volume2
Publication statusPublished - Dec 1 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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    Nohtomi, A., Sakae, T., Tenmuma, T., Tsunashima, Y., & Hayakawa, Y. (2004). Dose distribution measurement of clinical proton beams with an imaging plate. IEEE Nuclear Science Symposium Conference Record, 2, 695-697. [N16-118].