ZHU Hongyu, QIU Rui, LI Junli, REN Li, LIU Huan, LI Chunyan, WU Zhen
Key Laboratory of High Energy Radiation Imaging Fundamental Science, Key Laboratory of Particle & Radiation Imaging, Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing 100084, China
Abstract：The human eye lens is sensitive to radiation. Thus, detailed eye models are needed to accurately assess the dose and radiation risk for the eye lens. A detailed eye model was build based on the characteristic parameters of Chinese adult males. The eye model includes nine main structures for the eyelids, scleral, choroid, retina, lens, iris, cornea, vitreous body and aqueous humor. The model was then used in an MCNP code to calculated the eye lens absorbed dose conversion coefficients for electrons for various irradiation conditions. The results compared with other studies show that the relatively deep anterior chamber of the Chinese male eye results in significant differences in the absorbed dose for electron energies between 0.6-1.2 MeV with a maximum relative difference of 98%. The detailed eye model in this paper provides a tool for accurate assessments of eye lens doses of Chinese adult males.
ICRP. ICRP Publication 103:The 2007 Recommendations of the International Commission on Radiological Protection.[R]. Oxford:ICRP, 2007.
[2]
ICRP. ICRP Publication 118:ICRP Statement on Tissue Reactions and Early and Late Effects of Radiation in Normal Tissues and Organs-threshold Doses for Tissue Reactions in a Radiation Protection Context[R]. Oxford:ICRP, 2012.
[3]
Charles M W, Brown N. Dimensions of the human eye relevant to radiation protection (dosimetry)[J]. Physics in Medicine and Biology, 1975, 20(2):202-218.
[4]
Behrens R, Dietze G, Zankl M. Dose conversion coefficients for electron exposure of the human eye lens[J]. Physics in Medicine and Biology, 2009, 54(13):4069-4087.
[5]
Petoussi-Henss N, Bolch W E, Eckerman K F, et al. Conversion coefficients for radiological protection quantities for external radiation exposures[J]. Annals of the ICRP, 2010, 40(2):1-257.
[6]
Nogueira P, Zankl M, Schlattl H, et al. Dose conversion coefficients for monoenergetic electrons incident on a realistic human eye model with different lens cell populations[J]. Physics in Medicine and Biology, 2011, 56(21):6919-6934.
[7]
Worgul B V. The Edward S Harkness Eye Institute Resident's Basic Science Study Guide[M]. New York:Columbia University Press, 1991.
[8]
Caracappa P F, Rhodes A, Fiedler D. Multi-resolution voxel phantom modeling:A high-resolution eye model for computational dosimetry[J]. Physics in Medicine and Biology, 2014, 59(18):5261-5275.
[9]
赵堪兴, 杨培增. 眼科学[M]. 北京:人民卫生出版社, 2008.ZHAO Kanxing,YANG Peizeng. Ophthalmology[M]. Beijing:People's Medical Publishing House, 2008. (in Chinese)
[10]
Ding X, Li J, Zeng J, et al. Choroidal thickness in healthy Chinese subjects[J]. Investigative Ophthalmology & Visual Science, 2011, 52(13):9555-9560.
[11]
Olsen T W, Aaberg S Y, Geroski D H, et al. Human sclera:Thickness and surface area[J]. American Journal of Ophthal Mology, 1998, 125(2):237-241
[12]
王增叶, 姚祖荣, 叶雨木, 等. 中国人正常前房深度测量[J]. 眼科新进展, 1984,4(4):270-272.WANG Zengye, YAO Zurong, YE Yumu, et al. Measurement of Chinese normal anterior chamber depth[J]. New Progress in Ophthalmology, 1984, 4(4):270-272. (in Chinese)
[13]
Monte Carlo Team. MCNP——A General Purpose Monte Carlo N-particle Transport Code, Version 5, LA-UR-03-1987[R]. New Mexico:Los Alamos National Laboratory, 2003.
[14]
ICRP. ICRP Publication 89:Basic Anatomical and Physiological Data for Use in Radiological Protection:Reference Values[R]. Oxford:ICRP, 2002.
[15]
Snyder W S, Cook M, Nasset E, et al. ICRP Publication 23:Report of the Task Group on Reference Man[M]. Oxford:Pergamon, 1975.
[16]
ICRU. ICRU Report 46:Photon, Electron, Proton and Neutron Interaction Data for Body Tissues[R]. Bethesda:ICRU, 1992.
2017, Vol. 57 
