The Effects of Single and Bimetallic Silicon Composite Shields in Medical Imaging Methods: A Monte Carlo Study
,
Abstract
Purpose: Nowadays, the use of polymer composites with several metals to design and build new radiation composite shields with practical features in radiology is expanding.
Materials and Methods: Three metal oxides, including Bismuth oxide (Bi2O3), Tungsten oxide (WO3), and Tin oxide (SnO2) were used as mono-metal and bimetallic compound silicon matrixes for clarification of their practical use. Monte Carlo simulation methods were used to enter the specifications of each metal in combination with silicon. The mass attenuation coefficients of the mono- and bimetallic composites were calculated in the energy ranges of 40 to 150 KeV by classification to low/ medium/high groups.
Results: The results showed the beam reduction ability for both the mono- and the bimetallic composites. The mass attenuation coefficients of Bi2O3, WO3, and SnO2 at 80 KeV were 0.38, 0.33, and 0.57 cm2/gr, respectively. Moreover, the Bismuth-Tin bimetallic combination at low energies and the Bismuth-Tungsten at high energies had better attenuation than the other samples. To select bimetallic compounds with a high attenuation coefficient, it is better to match the energy used in the imaging method specifically. For example, in the 70-90 KeV energy range, the Sn-W combination had the highest beam attenuation coefficient.
Conclusion: The advantage of mono- and bimetallic shields in terms of energy attenuation amount depends on beam energy and shielding metal “K-absorption” edge. In comparing the attenuation of recorded beams in low, medium, and high ranges of energy, mono-metallic Bismuth shows higher attenuation coefficients than mono-metallic Tungsten and bi-metallic Bismuth–Tungsten. Dose reduction of the bi-metallic state of Bismuth - Tin was greater than that of mono-metallic Bismuth and Tin in low energies. Also, the attenuation of the Bi-Sn composite shield in low energy was the highest amount among all silicon composite shields.
2- Sepehr Batooei, Amir Moslehi, and Jalil Pirayesh Islamian, "Assessment of metallic nanoparticles as radioenhancers in gastric cancer therapy by Geant4 simulation and local effect model." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 488pp. 5-11, (2021).
3- P Mehnati and M Ghavami, "CT Role in the assessment of existence of breast cancerous cells." Journal of Biomedical Physics & Engineering, Vol. 10 (No. 3), p. 349, (2020).
4- R Smith-Bindman, J Lipson, and R Marcus, "Radiation dose associated with common computed tomography examinations and the associated lifetime attributable risk of cancer." Journal of Vascular Surgery, Vol. 51 (No. 3), p. 783, (2010).
5- Kyung-Hyun Do, "General principles of radiation protection in fields of diagnostic medical exposure." Journal of Korean medical science, Vol. 31 (No. Suppl 1), p. S6, (2016).
6- Reza Malekzadeh, Ali Tarighatnia, Parinaz Mehnati, and Nader D Nader, "Reduction of Radiation Risk to Cardiologists and Patients during Coronary Angiography: Effect of Exposure Angulation and Composite Shields." Frontiers in Biomedical Technologies, (2023).
7- Mahadevappa Mahesh, "Update on radiation safety and dose reduction in pediatric neuroradiology." Pediatric radiology, Vol. 45pp. 370-74, (2015).
8- Parinaz Mehnati, Reza Malekzadeh, Mohammad Yousefi Sooteh, and Soheila Refahi, "Assessment of the efficiency of new bismuth composite shields in radiation dose decline to breast during chest CT." The Egyptian Journal of Radiology and Nuclear Medicine, Vol. 49 (No. 4), pp. 1187-89, (2018).
9- Parinaz Mehnati, M Yousefi Sooteh, Reza Malekzadeh, Baharak Divband, and Soheila Refahi, "Breast conservation from radiation damage by using nano bismuth shields in chest computed tomography scan." (2019).
10- Parinaz Mehnati, Reza Malekzadeh, and Mohammad Yousefi Sooteh, "New Bismuth composite shield for radiation protection of breast during coronary CT angiography." Iranian Journal of Radiology, Vol. 16 (No. 3), (2019).
11- Parinaz Mehnati, Reza Malekzadeh, Mohamad Yousefi-Sooteh, and Farhad Yazdansetad, "Comparing X-ray dose reduction capability of silicon-bismuth micro-and nanocomposite shields using chest CT test." Radiation Safety and Measurement, Vol. 8 (No. 3), pp. 35-40, (2019).
12- Parinaz Mehnati, Reza Malekzadeh, and Mohammad Yousefi Sooteh, "Use of bismuth shield for protection of superficial radiosensitive organs in patients undergoing computed tomography: a literature review and meta-analysis." Radiological physics and technology, Vol. 12pp. 6-25, (2019).
13- Parinaz Mehnati, Reza Malekzadeh, and Mohammad Yousefi Sooteh, "Application of personal non-lead nano-composite shields for radiation protection in diagnostic radiology: a systematic review and meta-analysis." Nanomed. J, Vol. 7 (No. 3), pp. 170-82, (2020).
14- Parinaz Mehnati, Vida Sargazi, Zainab Yazdi Sotoodeh, Afshin Nejadjahantigh, and Masoome Farsizaban, "Introducing SRF in Bismuth-Silicon and Polyurethane shields for breast dose reduction during chest CT." Journal of Complementary Medicine Research, Vol. 11 (No. 5), pp. 195-95, (2021).
15- Parinaz Mehnati, Mehran Arash, and Parisa Akhlaghi, "Bismuth-silicon and bismuth-polyurethane composite shields for breast protection in chest computed tomography examinations." Journal of medical physics, Vol. 43 (No. 1), pp. 61-65, (2018).
16- Seyed Mohammad Javad Mortazavi, Alireza Zahiri, Daryoush Shahbazi-Gahrouei, Sedigheh Sina, and Masoud Haghani, "Designing a shield with lead-free polymer base with high radiation protection for X-ray photons in the range of diagnostic radiology using monte carlo simulation code MCNP5." Journal of Isfahan Medical School, Vol. 34 (No. 385), pp. 637-41, (2016).
17- Hajime Monzen et al., "A novel radiation protection device based on tungsten functional paper for application in interventional radiology." Journal of applied clinical medical physics, Vol. 18 (No. 3), pp. 215-20, (2017).
18- NZ Noor Azman, SA Siddiqui, and It Meng Low, "Characterisation of micro-sized and nano-sized tungsten oxide-epoxy composites for radiation shielding of diagnostic X-rays." Materials Science and Engineering: C, Vol. 33 (No. 8), pp. 4952-57, (2013).
19- Mohammad Mehdi Movahedi et al., "Novel paint design based on nanopowder to protection against X and gamma rays." Indian Journal of Nuclear Medicine, Vol. 29 (No. 1), pp. 18-21, (2014).
20- Hala Maher Ahmed, Mohamed Borg, Abd El-Aal Saleem, and Amira Ragab, "Multi-detector computed tomography in traumatic abdominal lesions: value and radiation control." Egyptian Journal of Radiology and Nuclear Medicine, Vol. 52 (No. 1), p. 214, (2021).
21- P Mehnati, M Arash, MS Zakerhamidi, and M Ghavami, "Designing and construction of breast shields using silicone composite of Bismuth for chest CT." International Journal of Radiation Research, Vol. 17 (No. 3), pp. 491-96, (2019).
22- Reza Malekzadeh, Parinaz Mehnati, Mohammad Yousefi Sooteh, and Asghar Mesbahi, "Influence of the size of nano-and microparticles and photon energy on mass attenuation coefficients of bismuth–silicon shields in diagnostic radiology." Radiological physics and technology, Vol. 12pp. 325-34, (2019).
23- Hao Chai et al., "Preparation and properties of novel, flexible, lead‐free X‐ray‐shielding materials containing tungsten and bismuth (III) oxide." Journal of Applied Polymer Science, Vol. 133 (No. 10), (2016).
24- F Kazemi and S Malekie, "A Monte Carlo study on the shielding properties of a novel polyvinyl alcohol (PVA)/WO3 composite, against gamma rays, using the MCNPX code." Journal of Biomedical Physics & Engineering, Vol. 9 (No. 4), p. 465, (2019).
25- Hoda Alavian and Hossein Tavakoli-Anbaran, "Study on gamma shielding polymer composites reinforced with different sizes and proportions of tungsten particles using MCNP code." Progress in nuclear energy, Vol. 115pp. 91-98, (2019).
| Files | ||
| Issue | Articles in Press | |
| Section | Original Article(s) | |
| Keywords | ||
| Bismuth Tin Tungsten Nanocomposites Computed Tomography Shields Patient Radiation | ||
| Rights and permissions | |
|
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
