Determination of Radiation Shielding Features of Polyvinyl Alcohol/Magnetite-Bismuth Oxide Composite Using Precise Computational Methods and Monte Carlo Code

Document Type : Original Paper

Authors

1 Department of Radiology, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran.

2 1-Radiology Department, Faculty of Paramedical Sciences, Shiraz University of Medical Sciences. Shiraz, Iran 2-Ionizing and Non-Ionizing Radiation Protection Research Center (INIRPRC), School of Paramedical Sciences, Shiraz University

3 Ionizing and Non-Ionizing Radiation Protection Research Center (INIRPRC), School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran. † Now at Physics Department, Università degli Studi di Torino, Turin, Italy.

4 Medical imaging research center, Shiraz university of medical sciences, Shiraz, Iran

Abstract

Introduction: Bismuth efficiency in shielding superficial tissues in computed tomography (CT) scans has been challenged due to the imbalance between image quality and dose reduction. The aim of this study is to reduce bismuth in shields and investigate the possibility of substitution with lower atomic materials.
Material and Methods: Five different compounds, including raw polyvinyl alcohol (PVA) and four other samples containing variable weight fractions of bismuth oxide and with a constant fraction of magnetite were selected. Shielding factors, including linear attenuation coefficient(μ), mass attenuation coefficient(μρ), half-value layer (HVL), electron density (Ne), and effective atomic number (Zeff), were evaluated over a wide range of energy by precise computational methods, XCOM, and Monte Carlo N-Particle code.
Results: Increasing the bismuth oxide concentration improves the radiation attenuation and absorption process. This effect was observed in the μρ graphs to medium energies (E < 0.3560 MeV).The simultaneous evaluation of Ne and Zeff predicts increased absorption due to the increased and dominant photoelectric effect (<0.1000 MeV), the raised Compton effect (0.1000 < E < 0.3560 MeV; followed by scattering owing to the predominant Compton effect), and formation (E ≈ 1.2200 MeV)and dominance of pair production phenomenon (E > 3.0000 MeV).Also, a quantitative analysis of absorption through HVL in several used energies showed the efficacy of these compounds in ionizing radiation absorption.
Conclusion: This study establishes the advantages of substituting bismuth with compounds having lower atomic number materials, and the possibility of alleviating bismuth and replacing it with magnetite and PVA in designing radiation shields in CT scans has been confirmed.

Keywords

Main Subjects

References

  1. Cember H, Johnson T. Introduction to Health Physics. 4th ed., McGraw-Hill Medical: New York; 2009.
  2. Chilton AB, Shultis JK, Faw RE. Principles of radiation shielding. Englewood Cliffs, NJ: Prentice Hall; 1984.
  3. Nambiar S, Yeow JT. Polymer-composite materials for radiation protection. ACS Appl Mater Interfaces. 2012 Nov 28;4(11):5717-26.
  4. More CV, Alsayed Z, Badawi M, Thabet A, Pawar PP. Polymeric composite materials for radiation shielding: a review. Environ Chem Lett. 2021 Aug 1;19(3):2057-90.
  5. Ambika MR, Nagaiah N, Suman SK. Role of bismuth oxide as a reinforcer on gamma shielding ability of unsaturated polyester based polymer composites. J Appl Polym Sci. 2017 Jul 1;134(13):44657.
  6. Mehrara R, Malekie S, Kotahi SM, Kashian S. Introducing a novel low energy gamma ray shield utilizing polycarbonate bismuth oxide composite. Sci Rep. 2021 Jan 12;11(1):1-3.
  7. Hosseini MA, Malekie S, Kazemi F. Experimental evaluation of gamma radiation shielding characteristics of polyvinyl alcohol/tungsten oxide composite: A comparison study of micro and nano sizes of the fillers. Nucl Instrum Methods Phys Res A. 2022 Feb;1026:166214.
  8. Hosseini MA, Kazemi F, Malekie S. A Monte Carlo study on the shielding properties of a novel polyvinyl alcohol (PVA)/WO3 composite, against gamma rays, using the MCNPX code. J Biomed Phys Eng. 2019 Dec;9(4):465.
  9. Noor Azman NZ, Musa NF, Nik Ab Razak NN, Ramli RM, Mustafa IS, Abdul Rahman A, et al. Effect of Bi2O3 particle sizes and addition of starch into Bi2O3–PVA composites for X-ray shielding. Appl Phys A. 2016 Sep;122(9):1-9.
  10. Brenner DJ, Hall EJ. Computed tomography—an increasing source of radiation exposure. N Engl J Med. 2007 Nov 29;357(22):2277-84.
  11. Mathews JD, Forsythe AV, Brady Z, Butler MW, Goergen SK, Byrnes GB, et al. Cancer risk in 680,000 people exposed to computed tomography scans in childhood or adolescence: data linkage study of 11 million Australians. BMJ. 2013 Mar 12;346:f2360.
  12. Dellie ST, Tesfaw AF. Evaluation of Local Diagnostic Reference Levels for Paediatric and Adult Patients Undergoing Head Computed Tomography Examination in Amhara Regional States, Ethiopia. Iran J Med Phys. 2023 Sep 1;20(5).
  13. Abyar M, Mahdavi M, Haddadi GH. Establishing local Diagnostic Reference Level for Adult Patients in Computed Tomography Examination in Kohgiluyeh and Boyer-Ahmad province. Iran J Med Phys. 2021 Jul 1;18(4).
  14. Okoro NO, Changizi V, Bagh EJ, Pak F. Optimization of Radiation Dose in Cranial Computed Tomography among Adults: Assessment of Radiation Dose against Image Quality. Iran J Med Phys. 2020 Sep 1;17(5).
  15. Asadinezhad M, Bahreyni Toossi MT, Nouri M. Diagnostic reference levels for computed tomography examinations in Iran: a nationwide radiation dose survey. Iran J Med Phys. 2019 Jan 1;16(1):20.
  16. Bahreyni Toossi MT, Zare H, Eslami Z, Bayani Roodi S, Daneshdoust M, Saeed Z, et al. Assessment of Radiation Dose to the Lens of the Eye and Thyroid of Patients Undergoing Head and Neck Computed Tomography at Five Hospitals in Mashhad, Iran. Iran J Med Phys. 2018 Oct 1;15(4):226-30.
  17. Mehnati P, Malekzadeh R, Sooteh MY. Use of bismuth shield for protection of superficial radiosensitive organs in patients undergoing computed tomography: a literature review and meta-analysis. Radiol Phys Technol. 2019 Mar;12(1):6-25
  18. Okoro NO, Changizi V, Bagh EJ, Pak F. Optimization of Radiation Dose in Cranial Computed Tomography among Adults: Assessment of Radiation Dose against Image Quality. Iran J Med Phys. 2020 Sep 1;17(5).
  19. Kawauchi S, Chida K, Moritake T, Hamada Y, Tsuruta W. Radioprotection of eye lens using protective material in neuro cone-beam computed tomography: Estimation of dose reduction rate and image quality. Phys Med. 2021 Apr;82:192-9.
  20. Kim MS, Choi J, Kim SY, Kweon DC. Adaptive statistical iterative reconstruction and bismuth shielding for evaluation of dose reduction to the eye and image quality during head CT. J Korean Phys Soc. 2014 Jun;64(6):923-8.
  21. Einstein AJ, Elliston CD, Groves DW, Cheng B, Wolff SD, Pearson GD, et al. Effect of bismuth breast shielding on radiation dose and image quality in coronary CT angiography. J Nucl Cardiol. 2012 Feb;19(1):100-8.
  22. McCollough CH, Wang J, Gould RG, Orton CG. The use of bismuth breast shields for CT should be discouraged. Med Phys. 2012 May;39(5):2321-4.
  23. Durante M. Space radiation protection: destination Mars. Life Sci Space Res. 2014;1:2-9.
  24. Daneshvar H, Milan KG, Sadr A, Sedighy SH, Malekie S, Mosayebi A. Multilayer radiation shield for satellite electronic components protection. Sci Rep. 2021 Jan 8;11(1):1-2.
  25. Sun J, Zhou S, Hou P, Yang Y, Weng J, Li X, et al. Synthesis and characterization of biocompatible Fe3O4 nanoparticles. J Biomed Mater Res A. 2007 Feb;80(2):333-41.
  26. Arsalani N, Fattahi H, Nazarpoor M. Synthesis and characterization of PVP-functionalized superparamagnetic Fe3O4 nanoparticles as an MRI contrast agent. Express Polym Lett. 2010 Jun;4(6):329-38.
  27. Oltolina F, Peigneux A, Colangelo D, Clemente N, D’Urso A, Valente G, et al. Biomimetic magnetite nanoparticles as targeted drug nanocarriers and mediators of hyperthermia in an experimental cancer model. Cancers. 2020 Sep 4;12(9):2564.
  28. Yew YP, Shameli K, Miyake M, Khairudin NB, Mohamad SE, Naiki T, et al. Biosynthesis of superparamagnetic magnetite Fe3O4 nanoparticles and biomedical applications in targeted anticancer drug delivery system: A review. Arab J Chem. 2020 Jan;13(1):2287-308.
  29. DeMerlis CC, Schoneker DR. Review of the oral toxicity of polyvinyl alcohol (PVA). Food Chem Toxicol. 2003 Mar;41(3):319-26.
  30. Baker MI, Walsh SP, Schwartz Z, Boyan BD. A review of polyvinyl alcohol and its uses in cartilage and orthopedic applications. J Biomed Mater Res Part B. 2012 Oct;100B(6):1451-7.
  31. Srinivasan K, Samuel EJ. Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer composite. J Med Phys. 2017 Oct-Dec;42(4):273.
  32. Hosseini M, Malekie S, Keshavarzi M. Analysis of radiation shielding characteristics of magnetite/high density polyethylene nanocomposite at diagnostic level using the MCNPX, XCOM, XMudat and Auto-Zeff programs. Mosc Univ Phys. 2021;76(Suppl 1):S52-61.
  33. Hashim A, Agool IR, Kadhim KJ. Novel of (polymer blend-Fe3O4) magnetic nanocomposites: preparation and characterization for thermal energy storage and release, gamma ray shielding, antibacterial activity and humidity sensors applications. J Mater Sci: Mater Electron. 2018 Jun;29(12):10369-94.
  34. Issa SA, Ahmad M, Tekin HO, Saddeek YB, Sayyed MI. Effect of Bi2O3 content on mechanical and nuclear radiation shielding properties of Bi2O3-MoO3-B2O3-SiO2-Na2O-Fe2O3 glass system. Results Phys. 2019 Jun 1;13:102165.
  35. Elmahroug Y, Almatari M, Sayyed MI, Dong MG, Tekin HO. Investigation of radiation shielding properties for Bi2O3-V2O5-TeO2 glass system using MCNP5 code. J Non Cryst Solids. 2018 Jul;499:32-40.
  36. ASTM Committee D-20 on Plastics. Standard test methods for density and specific gravity (relative density) of plastics by displacement. ASTM D20.70.01. American Society for Testing and Materials.
  37. Pellowitz D. MCNPX User’s Manual, version 2.6.0. Los Alamos Report No. LA CP. 2007; 2:408.
  38. Tekin HO. MCNP-X Monte Carlo code application for mass attenuation coefficients of concrete at different energies by modeling 3×3 inch NaI(Tl) detector and comparison with XCOM and Monte Carlo data. Sci Technol Nucl Install. 2016 Dec 1; 2016:334-40.
  39. NIST XCOM. Element/compound/mixture—physical measurement. National Institute of Standards and Technology. Available from: https://physics.nist.gov/PhysRefData/Xcom/Text/ref.html. Accessed Nov 2024.
  40. Hubbell J. Photon cross sections, attenuation coefficients and energy absorption coefficients. Natl Bur Stand (US) Rep No. NSRDS-NBS29, Washington DC. 1969 Aug.
  41. Manohara SR, Hanagodimath SM, Gerward L. Energy dependence of effective atomic numbers for photon energy absorption and photon interaction: studies of some biological molecules in the energy range 1 keV–20 MeV. Med Phys. 2008 Jan;35(1):388-402.
  42. Manohara SR, Hanagodimath SM, Thind KS, Gerward L. On the effective atomic number and electron density: a comprehensive set of formulas for all types of materials and energies above 1 keV. Nucl Instrum Methods Phys Res B. 2008 Oct;266(18):3906-12.
  43. Büyükyıldız M. Effective atomic numbers and electron densities for some lanthanide oxide compounds using direct method in the energy region of 1 keV-20 MeV. Bitlis Eren Univ J Sci Technol. 2016 Jan 1;6(1):7-12.
  44. Akyildirim H. Attenuation parameters and effective atomic numbers of concretes containing pumice for some photon energies by experiment, simulation and calculation. Avr Sci Technol J. 2018;14:90-5.
  45. Kucuk N, Cakir M, Isitman NA. Mass attenuation coefficients, effective atomic numbers and effective electron densities for some polymers. Radiat Prot Dosim. 2013 Jan 1;153(1):127-34.
  46. Taylor ML, Smith RL, Dossing F, Franich RD. Robust calculation of effective atomic numbers: The Auto‐Zeff software. Med Phys. 2012 Apr;39(4):1769-78.
  47. Olad A, Shakoori S. Electromagnetic interference attenuation and shielding effect of quaternary Epoxy-PPy/Fe3O4-ZnO nanocomposite as a broadband microwave-absorber. J Magn Magn Mater. 2018 Jul 15;458:335-45.
  48. Chen Y, Wang Y, Zhang HB, Li X, Gui CX, Yu ZZ. Enhanced electromagnetic interference shielding efficiency of polystyrene/graphene composites with magnetic Fe3O4 nanoparticles. Carbon. 2015 Feb 1;82:67-76.
  49. Huangfu Y, Liang C, Han Y, Qiu H, Song P, Wang L, et al. Fabrication and investigation on the Fe3O4/thermally annealed graphene aerogel/epoxy electromagnetic interference shielding nanocomposites. Compos Sci Technol. 2019 Jan 5;169:70-5.
  50. Saba V, Keshtkar M. Targeted radiation energy modulation using Saba shielding reduces breast dose without degrading image quality during thoracic CT examinations. Physica Medica. 2019 Sep 1;65:238-46.
  51. Keshtkar M, Blouri B, Mahmoudabadi A, Alami A. Eye radiation dose saving in head CT examinations using copper-bismuth radiation shield. Radiat Prot Dosimetry. 2023 Feb;199(2):146-51.
  52. Van Elmpt W, Landry G, Das M, Verhaegen F. Dual energy CT in radiotherapy: current applications and future outlook. Radiother Oncol. 2016 Apr 1;119(1):137-44.

 

 

 

 

 

Iranian Journal of Medical Physics
Volume 21, Issue 6 - Serial Number 6
November and December 2024
Pages 381-390

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History

  • Receive Date: 24 July 2023
  • Revise Date: 07 October 2023
  • Accept Date: 05 November 2023

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