Exposures in interventional radiology using Monte Carlo simulation coupled with virtual anthropomorphic phantoms
Autor: | Lucio P. Neves, A.B. Carvalho, Walmir Belinato, Linda V.E. Caldas, Ana F. Maia, Ana P. Perini, William S. Santos |
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Rok vydání: | 2015 |
Předmět: |
Radiation transport
Materials science medicine.diagnostic_test Phantoms Imaging business.industry Projection angle Monte Carlo method Biophysics General Physics and Astronomy Medical practice Interventional radiology Environmental Exposure General Medicine Radiology Interventional Clinical Practice Physicians Conversion coefficients medicine Humans Radiology Nuclear Medicine and imaging Nuclear medicine business Monte Carlo Method Skin Biomedical engineering |
Zdroj: | Physica Medica. 31:929-933 |
ISSN: | 1120-1797 |
DOI: | 10.1016/j.ejmp.2015.06.011 |
Popis: | In this work we investigated the way in which conversion coefficients from air kerma-area product for effective doses (CCE) and entrance skin doses (CCESD) in interventional radiology (IR) are affected by variations in the filtration, projection angle of the X-ray beam, lead curtain attached to the surgical table, and suspended shield lead glass in regular conditions of medical practice. Computer simulations were used to model an exposure scenario similar to a real IR room. The patient and the physician were represented by MASH virtual anthropomorphic phantoms, inserted in the MCNPX 2.7.0 radiation transport code. In all cases, the addition of copper filtration also increased the CCE and CCESD values. The highest CCE values were obtained for lateral, cranial and caudal projections. In these projections, the X-ray tube was located above the table, and more scattered radiation reached the middle and upper portions of the physician trunk, where most of the radiosensitive organs are located. Another important result of this study was to show that the physician's protection is 358% higher when the lead curtain and suspended shield lead glasses are used. The values of CCE and CCESD, presented in this study, are an important resource for calculation of effective doses and entrance skin doses in clinical practice. |
Databáze: | OpenAIRE |
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