Three-dimensional radiochromic film dosimetry of proton clinical beams using a gafchromic EBT2 film array

Jinsung Kim, Myonggeun Yoon, Seonkyu Kim, Dongho Shin, Se Byeong Lee, Young Kyung Lim, Dong Wook Kim, Sung Yong Park

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this work, three-dimensional (3D) film-based proton beam measurements were used for the first time to verify the patient-specific radiation dose distribution, beam range and compensator shape. Three passively scattered proton beams and one uniform scanning proton beam were directed onto an acrylic phantom with inserted Gafchromic EBT films. The average gamma index for a comparison of the dose distributions was less than one for 97.2 % of all pixels from the passively scattered proton beams and 98.1 % of all pixels for the uniform scanning proton beams, with a 3 % dose and a 3 mm distance-to-dose agreement tolerance limit. The results also showed that the average percentage of points within the acceptance criteria for proton beam ranges was 94.6 % for the passively scattered proton beams. Both the dose distribution and the proton beam range determined by the 3D EBT film measurement agreed well with the planning system values.

Original languageEnglish
Article numberncs010
Pages (from-to)272-277
Number of pages6
JournalRadiation Protection Dosimetry
Volume151
Issue number2
DOIs
Publication statusPublished - 2012 Aug 1

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ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Radiation
  • Public Health, Environmental and Occupational Health

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