Construction and performance of a dose-verification scintillation-fiber detector for proton therapy

Suhyun Lee, Byungsik Hong, Kyong Sei Lee, Benard Mulilo, Sung Keun Park

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A multilayer scintillation-fiber detector has been developed for precision measurement of time-dependent dose verification in proton therapy. In order to achieve the time and position sensitivity required for the precision dose measurements, a prototype detector was constructed with double-clad 1-mm-thick scintillation fibers and 128-channel silicon photodiodes. The hole charges induced in each channel of the silicon photodiodes were amplified and processed with a charge-integration mode. The detector was tested with 45-MeV proton beams provided by the MC50 cyclotron at the Korea Institute of Radiological and Medical Science (KIRAMS). The detector response for a 45-MeV proton beam was agreed fairly well with the predicted by GEANT4 simulations. Furthermore, the quantitative accuracy appearing in the spatial distribution of the detector response measured for 20 s is in the order of 1%, whose accuracy is satisfactory to verify beam-induced dose in proton therapy. We anticipate that the detector composed of scintillation fibers and operating in the charge-integration mode allows us to perform quality measurement of dynamic therapeutic beams.

Original languageEnglish
Pages (from-to)6-11
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume724
DOIs
Publication statusPublished - 2013

Bibliographical note

Funding Information:
This study was supported by the Korea Science and Engineering Foundation (Grant no. NRF-2012M2B2A9A02029382 ). This study was also strongly motivated by future applications to medical sciences with the RAON accelerator of the Rare Isotope Science Project (RISP) in the Institute for Basic Science (IBS) of Korea. The authors also wish to thank Dr. Gye Hong Kim at the Korea Institute of Radiological and Medical Science (KIRAMS) for providing technical assistance with the MC50-proton beam line.

Keywords

  • Dose verification
  • Dynamic beams
  • GEANT4 simulations
  • Proton therapy
  • Scintillation fibers

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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