Monte Carlo simulations for external neutron dosimetry based on the visible Chinese human phantom

A group of Monte Carlo simulations has been performed for external neutron dosimetry calculation based on a whole-body anatomical model, the visible Chinese human (VCH) phantom, which was newly developed from high-resolution cryosectional color photographic images of a healthy Chinese adult male cadaver. Physical characteristics of the VCH computational phantom that consists of 230 x 120 x 892 voxels corresponding to an element volume of 2 x 2 x 2 mm(3) are evaluated through comparison against a variety of other anthropomorphic models. Organ-absorbed doses and the effective doses for monoenergic neutron beams ranging from 10(-9) MeV to 10 GeV under six idealized irradiation geometries (AP, PA, LLAT, RLAT, ROT and ISO) were calculated using the Monte Carlo code MCNPX2.5. Absorbed dose results for selected organs and the effective doses are presented in the form of tables. Dose results are also compared with currently available neutron data form ICRP Publication 74 and those of VIP-Man. Anatomical variations between different models, as well as their influence on dose distributions, are explored. Detailed information derived from the VCH phantom is able to lend quantitative references to the widespread application of human computational models in radiology.

[1]  J. W. Vieira,et al.  All about FAX: a Female Adult voXel phantom for Monte Carlo calculation in radiation protection dosimetry. , 2003, Physics in medicine and biology.

[2]  Icrp.  1990 Recommendations of the International Commission on Radiological Protection , 1991 .

[3]  J. W. Vieira,et al.  MAX06 and FAX06: update of two adult human phantoms for radiation protection dosimetry , 2006, Physics in medicine and biology.

[4]  C. Kalbach.  The Griffin model, complex particles and direct nuclear reactions , 1977 .

[5]  Y. Yamaguchi.  Age-Dependant Effective Doses for Neutrons from Thermal to 18.3 MeV , 1994 .

[6]  H. Bertini.  Intranuclear-cascade calculation of the secondary nucleon spectra from nucleon-nucleus interactions in the energy range 340 to 2900 mev and comparisons with experiment , 1969 .

[7]  T. Nagaoka,et al.  Development of realistic high-resolution whole-body voxel models of Japanese adult males and females of average height and weight, and application of models to radio-frequency electromagnetic-field dosimetry. , 2004, Physics in medicine and biology.

[8]  Nina Petoussi-Henss,et al.  The GSF family of voxel phantoms , 2002, Physics in medicine and biology.

[9]  G Drexler,et al.  Realistic computerized human phantoms. , 1994, Advances in space research : the official journal of the Committee on Space Research.

[10]  V. Mareš,et al.  Organ Doses and Dose Equivalents for Neutrons above 20 MeV , 1997 .

[11]  G. Burger,et al.  Organ Doses and Effective Dose Equivalent , 1985 .

[12]  Habib Zaidi,et al.  Computational anthropomorphic models of the human anatomy: the path to realistic Monte Carlo modeling in radiological sciences. , 2007, Annual review of biomedical engineering.

[13]  J. E. Tanner,et al.  Calculation of neutron fluence to dose conversion factors for extremities , 1993 .

[14]  J. Valentin.  Basic anatomical and physiological data for use in radiological protection: reference values , 2002, Annals of the ICRP.

[15]  Y. Yariv,et al.  Intranuclear cascade calculation of high-energy heavy-ion interactions , 1979 .

[16]  R. Cloutier.  Tissue Substitutes in Radiation Dosimetry and Measurement. , 1989 .

[17]  X. Xu,et al.  Fluence-to-dose conversion coefficients from monoenergetic neutrons below 20 MeV based on the VIP-Man anatomical model , 2000, Physics in medicine and biology.

[18]  M Zankl,et al.  Construction of a computed tomographic phantom for a Japanese male adult and dose calculation system , 2001, Radiation and environmental biophysics.

[19]  Harold O. Wyckoff,et al.  International Commission ON Radiation Units and Measurements (ICRU). , 1974, The American journal of roentgenology, radium therapy, and nuclear medicine.

[20]  Jai-Ki Lee,et al.  Development of the two Korean adult tomographic computational phantoms for organ dosimetry. , 2006, Medical physics.

[21]  P. Dimbylow.  FDTD calculations of the whole-body averaged SAR in an anatomically realistic voxel model of the human body from 1 MHz to 1 GHz. , 1997, Physics in medicine and biology.

[22]  D. J. Brenner.  Conversion Coefficients for Use in Radiological Protection against External Radiation , 1999 .

[23]  A. Bozkurt,et al.  VIP-MAN: AN IMAGE-BASED WHOLE-BODY ADULT MALE MODEL CONSTRUCTED FROM COLOR PHOTOGRAPHS OF THE VISIBLE HUMAN PROJECT FOR MULTI-PARTICLE MONTE CARLO CALCULATIONS , 2000, Health physics.

[24]  X. Xu,et al.  Fluence-to-dose conversion coefficients based on the VIP-Man anatomical model and MCNPX code for monoenergetic neutrons above 20 MeV. , 2001, Health physics.

[25]  K. F. Eckerman,et al.  Specific absorbed fractions of energy at various ages from internal photon sources: 6, Newborn , 1987 .

[26]  W Abmayr,et al.  The calculations of dose from external photon exposures using reference and realistic human phantoms and Monte Carlo methods , 1986 .

[27]  Shaoqun Zeng,et al.  THE DEVELOPMENT AND APPLICATION OF THE VISIBLE CHINESE HUMAN MODEL FOR MONTE CARLO DOSE CALCULATIONS , 2008, Health physics.

[28]  T. S. Chen,et al.  Patient risk from interproximal radiography. , 1984, Oral surgery, oral medicine, and oral pathology.