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	Dose conversion coefficients based on the Chinese mathematical phantom and MCNP code for external photon irradiation
	Qiu, Rui ; Li, Junli ; Zhang, Zhan ; Liu, Liye ; Bi, Lei ; Ren, Li
	2010-10-12 ; 2010-10-12
关键词	COLOR PHOTOGRAPHS VIP-MAN ADULT MODEL DOSIMETRY ORGAN BODY Environmental Sciences Public, Environmental & Occupational Health Nuclear Science & Technology Radiology, Nuclear Medicine & Medical Imaging
中文摘要	A set of conversion coefficients from kerma free-in-air to the organ-absorbed dose are presented for external monoenergetic photon beams from 10 keV to 10 MeV based on the Chinese mathematical phantom, a whole-body mathematical phantom model. The model was developed based on the methods of the Oak Ridge National Laboratory mathematical phantom series and data from the Chinese Reference Man and the Reference Asian Man. This work is carried out to obtain the conversion coefficients based on this model, which represents the characteristics of the Chinese population, as the anatomical parameters of the Chinese are different from those of Caucasians. Monte Carlo simulation with MCNP code is carried out to calculate the organ dose conversion coefficients. Before the calculation, the effects from the physics model and tally type are investigated, considering both the calculation efficiency and precision. In the calculation irradiation conditions include anterior-posterior, posterior-anterior, right lateral, left lateral, rotational and isotropic geometries. Conversion coefficients from this study are compared with those recommended in the Publication 74 of International Commission on Radiological Protection (ICRP74) since both the sets of data are calculated with mathematical phantoms. Overall, consistency between the two sets of data is observed and the difference for more than 60% of the data is below 10%. However, significant deviations are also found, mainly for the superficial organs (up to 65.9%) and bone surface (up to 66%). The big difference of the dose conversion coefficients for the superficial organs at high photon energy could be ascribed to kerma approximation for the data in ICRP74. Both anatomical variations between races and the calculation method contribute to the difference of the data for bone surface.
语种	英语 ; 英语
出版者	OXFORD UNIV PRESS ; OXFORD ; GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78866]
专题	清华大学
推荐引用方式 GB/T 7714	Qiu, Rui,Li, Junli,Zhang, Zhan,et al. Dose conversion coefficients based on the Chinese mathematical phantom and MCNP code for external photon irradiation[J],2010, 2010.
APA	Qiu, Rui,Li, Junli,Zhang, Zhan,Liu, Liye,Bi, Lei,&Ren, Li.(2010).Dose conversion coefficients based on the Chinese mathematical phantom and MCNP code for external photon irradiation..
MLA	Qiu, Rui,et al."Dose conversion coefficients based on the Chinese mathematical phantom and MCNP code for external photon irradiation".(2010).

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