Development and validation of a monte carlo modeling of millennium MLC

Y. Ishihara, Tokihiro Yamamoto, Y. Miyabe, T. Mizowaki, Y. Narita, S. Yano, T. Teshima, M. Hiraoka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Most of the commercial treatment planning systems doesn't take into account multileaf collimator (MLC) design which causes the leakage radiation, the tongue-and-groove effect, beam hardening and rounded leaf tip effect in intensity-modulated radiotherapy (IMRT) field. We were to develop an integrated Monte Carlo (MC) dose calculation system called MCRTV (Monte Carlo for Radiotherapy Treatment plan Verification) as a routine verification tool of radiotherapy. In this study we try to construct accurate model of the Varian Millennium 120-leaf MLC and validate the model using the EGS4/PRESTA MC code. Leakage, picket fence, and sliding window tests were calculated using well-commissioned 15MV photon beam. These results were compared and validated measured dataes. All MC simulations matched measured ones less than 2.0 %. Leaf leakage radiation was 1.38% on average. Tongue-and-groove design caused 8.3% underdose on average. According to these results, we could constructed precise Millennium model and accuracy were validated to develop a MCRTV for IMRT.

Original languageEnglish (US)
Title of host publicationProceedings of the 15th EGS Users' Meeting in Japan
Pages47-53
Number of pages7
StatePublished - 2008
Externally publishedYes
Event15th EGS Users' Meeting in Japan 2008 - Tsukuba, Japan
Duration: Aug 6 2008Aug 8 2008

Other

Other15th EGS Users' Meeting in Japan 2008
CountryJapan
CityTsukuba
Period8/6/088/8/08

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Radiotherapy
Radiation
Fences
Dosimetry
Hardening
Photons
Planning

ASJC Scopus subject areas

  • Software

Cite this

Ishihara, Y., Yamamoto, T., Miyabe, Y., Mizowaki, T., Narita, Y., Yano, S., ... Hiraoka, M. (2008). Development and validation of a monte carlo modeling of millennium MLC. In Proceedings of the 15th EGS Users' Meeting in Japan (pp. 47-53)

Development and validation of a monte carlo modeling of millennium MLC. / Ishihara, Y.; Yamamoto, Tokihiro; Miyabe, Y.; Mizowaki, T.; Narita, Y.; Yano, S.; Teshima, T.; Hiraoka, M.

Proceedings of the 15th EGS Users' Meeting in Japan. 2008. p. 47-53.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ishihara, Y, Yamamoto, T, Miyabe, Y, Mizowaki, T, Narita, Y, Yano, S, Teshima, T & Hiraoka, M 2008, Development and validation of a monte carlo modeling of millennium MLC. in Proceedings of the 15th EGS Users' Meeting in Japan. pp. 47-53, 15th EGS Users' Meeting in Japan 2008, Tsukuba, Japan, 8/6/08.
Ishihara Y, Yamamoto T, Miyabe Y, Mizowaki T, Narita Y, Yano S et al. Development and validation of a monte carlo modeling of millennium MLC. In Proceedings of the 15th EGS Users' Meeting in Japan. 2008. p. 47-53
Ishihara, Y. ; Yamamoto, Tokihiro ; Miyabe, Y. ; Mizowaki, T. ; Narita, Y. ; Yano, S. ; Teshima, T. ; Hiraoka, M. / Development and validation of a monte carlo modeling of millennium MLC. Proceedings of the 15th EGS Users' Meeting in Japan. 2008. pp. 47-53
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