دورية أكاديمية
Physical models, cross sections, and numerical approximations used in MCNP and GEANT4 Monte Carlo codes for photon and electron absorbed fraction calculation.
| العنوان: | Physical models, cross sections, and numerical approximations used in MCNP and GEANT4 Monte Carlo codes for photon and electron absorbed fraction calculation. |
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| المؤلفون: | Yoriyaz H; Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, São Paulo 05508-000, Brazil. hyoriyaz@ipen.br, Moralles M, Siqueira Pde T, Guimarães Cda C, Cintra FB, dos Santos A |
| المصدر: | Medical physics [Med Phys] 2009 Nov; Vol. 36 (11), pp. 5198-213. |
| نوع المنشور: | Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: John Wiley and Sons, Inc Country of Publication: United States NLM ID: 0425746 Publication Model: Print Cited Medium: Print ISSN: 0094-2405 (Print) Linking ISSN: 00942405 NLM ISO Abbreviation: Med Phys Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: 2017- : Hoboken, NJ : John Wiley and Sons, Inc. Original Publication: Lancaster, Pa., Published for the American Assn. of Physicists in Medicine by the American Institute of Physics. |
| مواضيع طبية MeSH: | Absorption* , Computer Simulation* , Electrons* , Models, Theoretical* , Monte Carlo Method* , Photons*, Algorithms ; Bone Marrow/radiation effects ; Bone and Bones/radiation effects ; Humans ; Lung/radiation effects ; Radiation Dosage ; Software ; Water |
| مستخلص: | Purpose: Radiopharmaceutical applications in nuclear medicine require a detailed dosimetry estimate of the radiation energy delivered to the human tissues. Over the past years, several publications addressed the problem of internal dose estimate in volumes of several sizes considering photon and electron sources. Most of them used Monte Carlo radiation transport codes. Despite the widespread use of these codes due to the variety of resources and potentials they offered to carry out dose calculations, several aspects like physical models, cross sections, and numerical approximations used in the simulations still remain an object of study. Accurate dose estimate depends on the correct selection of a set of simulation options that should be carefully chosen. This article presents an analysis of several simulation options provided by two of the most used codes worldwide: MCNP and GEANT4. Methods: For this purpose, comparisons of absorbed fraction estimates obtained with different physical models, cross sections, and numerical approximations are presented for spheres of several sizes and composed as five different biological tissues. Results: Considerable discrepancies have been found in some cases not only between the different codes but also between different cross sections and algorithms in the same code. Maximum differences found between the two codes are 5.0% and 10%, respectively, for photons and electrons. Conclusion: Even for simple problems as spheres and uniform radiation sources, the set of parameters chosen by any Monte Carlo code significantly affects the final results of a simulation, demonstrating the importance of the correct choice of parameters in the simulation. |
| المشرفين على المادة: | 059QF0KO0R (Water) |
| تواريخ الأحداث: | Date Created: 20091210 Date Completed: 20100112 Latest Revision: 20170214 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1118/1.3242304 |
| PMID: | 19994530 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 0094-2405 |
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| DOI: | 10.1118/1.3242304 |