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KMID : 0384620070180030126
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Korean Journal of Medical Physics
2007 Volume.18 No. 3 p.126 ~ p.133
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A Monte Carlo Simulation for the Newly Developed Head-and-Neck IMRT Phantom: a Pilot Study
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Kang Sei-Kwon
Cheong Kwang-Ho
Jo Byung-Chul
Oh Do-Hoon
Kim Su-San
Kim Kyoung-Joo
Bae Hoon-Sik
Han Young-Yih
Shin Eun-Hyuk
Park Sung-Ho
Lim Chun-Il
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Abstract
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A head-and-neck phantom was designed in order to evaluate remotely the quality of the delivery dose of intensity modulated radiation therapy (IMRT) in each institution. The phantom is homogeneous or inhomogeneous by interchanging the phantom material with the substructure like an air or bone plug. Monte Carlo simulations were executed for one beam and three beams to the phantom and compared with ion chamber and thermoluminescent dosimeter (TLD) measurements of which readings were from two independent institutions. For single beam, the ion chamber results and the MC simulations agreed to within about 2% TLDs agreed with the MC results to within 2% or 7% according to which institution read the TLDs. For three beams, the ion chamber results showed -5% maximum discrepancy and those of TLDs were +2{sim}+3%. The accuracy of the TLD leadings should be increased for the remote dose monitoring. MC simulations are a valuable tool to acquire the reliability of the measurements in developing a new phantom.
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KEYWORD
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IMRT phantom, Monte Carlo simulation, Remote dose monitoring, Ion chamber, TLD
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