International Journal of Radiation Research

en Eye lens dose estimations in chest computed tomography examinations using Monte Carlo simulations in a Siemens SOMATOM perspective scanner Radiation Biology Radiation Biology تحقيق بديع Original Research <div style="text-align: justify;">Background: The radiation dose received by the eye lens when a chest computed tomography (CT) scan is performed, is generally not recorded in clinical practice, particularly due to the distance of this organ from the X-ray beam. Material and Methods: The absorbed dose in the eye lens was determined by Monte Carlo N-Particle version 5 (MCNP5) calculations and thermoluminescence dosimetry (TLD). Two models of the CT scanner and patient were constructed using the MCNP5 code. The first model was the Bottle Manikin Absorber (BOMAB), which includes the main structures of the eye, and the second was the computational voxelized phantom MAX06. In addition, measurements were carried out in 21 adult patients, which underwent a chest CT study in a Siemens SOMATOM Perspective scanner. Results: Average Monte Carlo values for the absorbed dose of 16.4 ± 0.4 mGy and 1.97 ± 0.04 mSv for the effective dose were obtained when the BOMAB model was used. Mean values of 13.3 ± 0.3 mGy and 1.59 ± 0.04 mSv, respectively, were obtained for the absorbed dose and effective dose for the MAX06 phantom. TLD measurements gave average values of 12.66 ± 1.33 mGy and 1.52 ± 0.16 mSv for absorbed dose and effective dose, respectively, in simple chest scans, and 7.60 ± 0.63 mGy and 0.91 ± 0.07 mSv, respectively, for simple contrast-enhanced studies. Conclusions: The results of the Monte Carlo simulations with BOMAB and voxelized phantoms in our study agree relatively well with each other.</div> Monte Carlo method, eye lens, radiation dosage, tomography. 853 860 http://ijrr.com/browse.php?a_code=A-10-1-1249&slc_lang=en&sid=1 M.I. León 7900319475328460028397 7900319475328460028397 No Department of Physical Engineering, DCI, University of Guanajuato, 37150 Leon, Gto., Mexico B. Quispe 7900319475328460028398 7900319475328460028398 No Department of Physical Engineering, DCI, University of Guanajuato, 37150 Leon, Gto., Mexico L. Gutiérrez 7900319475328460028399 7900319475328460028399 No Mexican Institute of Social Security, Health Research Division, High Specialty Medical Unit T1, 37530 Leon, Gto., Mexico J.D. Peña 7900319475328460028400 7900319475328460028400 No Department of Physical Engineering, DCI, University of Guanajuato, 37150 Leon, Gto., Mexico G. Waldo 7900319475328460028401 7900319475328460028401 No Department of Physical Engineering, DCI, University of Guanajuato, 37150 Leon, Gto., Mexico P. Cerón 7900319475328460028402 7900319475328460028402 No Department of Environmental Sciences, DCIyT, University of Quintana Roo, 77019, Chetumal, QRoo, Mexico M.A. Hernández 7900319475328460028403 7900319475328460028403 No Mexican Institute of Social Security, Health Research Division, High Specialty Medical Unit T1, 37530 Leon, Gto., Mexico H.R. Vega 7900319475328460028404 7900319475328460028404 No Academic Unit of Nuclear Studies, Autonomous University of Zacatecas, 98000 Zacatecas, Zac., Mexico E. Montes 7900319475328460028405 7900319475328460028405 No Department of Physical Engineering, DCI, University of Guanajuato, 37150 Leon, Gto., Mexico U. Reyes 7900319475328460028406 7900319475328460028406 No State Center of Cancerology, Durango Health Services, 34000 Durango, Dgo., Mexico M. Vallejo 7900319475328460028407 7900319475328460028407 No Department of Physical Engineering, DCI, University of Guanajuato, 37150 Leon, Gto., Mexico M. Sosa modesto@fisica.ugto.mx 7900319475328460028408 7900319475328460028408 Yes Department of Physical Engineering, DCI, University of Guanajuato, 37150 Leon, Gto., Mexico