title: A new human eye model for ophthalmic brachytherapy dosimetry.
abstract: The present work proposes a new mathematical eye model for ophthalmic brachytherapy dosimetry. This new model includes detailed description of internal structures that were not treated in previous works, allowing dose determination in different regions of the eye for a more adequate clinical analysis. Dose calculations were determined with the MCNP-4C Monte Carlo particle transport code running n parallel environment using PVM. The Amersham CKA4 ophthalmic applicator has been chosen and the depth dose distribution has been determined and compared to those provide by the manufacturer. The results have shown excellent agreement. Besides, absorbed dose values due to both 125I seeds and 60Co plaques were obtained for each one of the different structures which compose the eye model and can give relevant information in eventual clinical analyses.
authors.affiliation: Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN-SP, Av. Lineu Prestes, 2242, Cidade Universitária, P.O. Box 11049, 05508-000 São Paulo, Brazil. hyoriyaz@ipen.br
authors.forename: Hélio
authors.initials: H
authors.lastname: Yoriyaz
authors.forename: Andrea
authors.initials: A
authors.lastname: Sanchez
authors.forename: Adimir
authors.initials: A
authors.lastname: dos Santos
mesh_terms: D001822:Body Burden; D001918:Brachytherapy / Q000379:methods*; D003198:Computer Simulation; D005123:Eye / Q000503:physiopathology*; D005134:Eye Neoplasms / Q000503:physiopathology* / Q000532:radiotherapy*; D006801:Humans; D008954:Models, Biological; D009928:Organ Specificity; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods; D011874:Radiometry / Q000379:methods*; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D012062:Relative Biological Effectiveness