Radiological Physics and Technology

, Volume 4, Issue 2, pp 216–224 | Cite as

A convolution/superposition method using primary and scatter dose kernels formed for energy bins of X-ray spectra reconstructed as a function of off-axis distance: comparison of calculated and measured 10-MV X-ray doses in thorax-like phantoms

  • Shigenobu Kimura
  • Kohji Sutoh
  • Kazuo Kamimura
  • Akira Iwasaki
  • Makoto Sasamori
  • Fumio Komai
  • Morio Seino
  • Singo Terashima
  • Mamoru Kubota
  • Junichi Hirota
  • Yoichiro Hosokawa
Article

Abstract

We performed experimental studies on the convolution/superposition method reported in the former companion paper (Iwasaki in Radiol Phys Technol 4, 2011) using 10-MV X-ray beams from open-jaw-collimated fields. The method uses primary and scatter dose kernels formed for energy bins of X-ray spectra reconstructed as a function of off-axis distance. We made a comparison of calculations and measurements in water phantoms and thorax-like phantoms with respect to percentage depth dose curves, tissue–phantom ratio curves, and dose profiles. We made the dose calculation by taking into account the beam-hardening effect with depth and the off-axis radiation-softening effect. We found that the method could be used, in general, for performing accurate dose calculations.

Keywords

Convolution/superposition method Components method Thorax phantoms X-ray spectra Dose kernels 10-MV X rays 

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Copyright information

© Japanese Society of Radiological Technology and Japan Society of Medical Physics 2011

Authors and Affiliations

  • Shigenobu Kimura
    • 1
  • Kohji Sutoh
    • 1
  • Kazuo Kamimura
    • 1
  • Akira Iwasaki
    • 2
  • Makoto Sasamori
    • 3
  • Fumio Komai
    • 4
  • Morio Seino
    • 5
  • Singo Terashima
    • 6
  • Mamoru Kubota
    • 6
  • Junichi Hirota
    • 6
  • Yoichiro Hosokawa
    • 6
  1. 1.Department of RadiologyAomori City HospitalAomoriJapan
  2. 2.HirosakiJapan
  3. 3.Department of RadiologyMisawa City HospitalMisawaJapan
  4. 4.Department of RadiologyAomori Prefectural HospitalAomoriJapan
  5. 5.Department of RadiologyHirosaki University HospitalHirosakiJapan
  6. 6.Graduate School of Health SciencesHirosaki UniversityHirosakiJapan

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