title: Creation of a voxel phantom of the ICRP reference crab.
abstract: The International Commission on Radiological Protection (ICRP) has modeled twelve reference animal and plant (RAP) species using simple geometric shapes in Monte-Carlo (MCNP) based simulations. The focus has now shifted to creating voxel phantoms of each RAP in order to estimate doses to biota with a higher degree of confidence. This paper describes the creation of a voxel model of a Dungeness crab from CT images with shell, gills, gonads, hepatopancreas, and heart identified and segmented. Absorbed fractions were tabulated for each organ as a source and target at twelve photon and nine electron energies: 0.01, 0.015, 0.02, 0.03, 0.05, 0.1, 0.2, 0.5, 1.0, 1.5, 2.0, and 4.0 MeV for photons and 0.1, 0.2, 0.4, 0.5, 0.7, 1.0, 1.5, 2.0 and 4.0 MeV for electrons. AFs whose error exceeded 5% are marked with an underline in the data tables; AFs whose error was higher than 10% were excluded, and are shown in the tabulated data as a dashed line. A representative sample of the data is shown in Figs. 3-8; the entire data set is available as an electronic appendix. The results are consistent with previous small organism studies (Kinase, 2008; Stabin et al., 2006), and suggest that AF values are highly dependent on source organ location and mass.
authors: Department of Nuclear Engineering and Radiation Health Physics, Oregon State University, 100 Radiation Center, Corvallis, OR 97331, USA. caffrey.emily@gmail.com
authors: E A
authors: EA
authors: Caffrey
authors: K A
authors: KA
authors: Higley
mesh_terms: D060105:Animal Shells / Q000000981:diagnostic imaging; D000818:Animals; D003386:Brachyura; D003198:Computer Simulation; D004583:Electrons; D004784:Environmental Monitoring; D005880:Gills / Q000000981:diagnostic imaging; D006066:Gonads / Q000000981:diagnostic imaging; D006321:Heart / Q000000981:diagnostic imaging; D043143:Hepatopancreas / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008954:Models, Biological; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D017785:Photons; D012984:Software; D014057:Tomography, X-Ray Computed