Synthesis and characterization of nano Bi2O3 for radiology shield

Objective (s): Recently, the use of nanoparticles in medicine has increased for radiation protection purpose. Thus the aim of this study was to use nano Bi2O3 in prepared shield for dose reduction during medical imaging. Materials and Methods: Nano Bi2O3 shield with 90% silicon and 10% nano Bi2O3 was prepared and dosimetry test was down in radiology by PTW DIADOS E dosimeter. Results: The mean dose without using nano Bi2O3 shields were 421 μGy, 733 μGy and 1110 μGy for 60, 80 and 100 kVp, respectively. After applying 0.5 mm thickness of nano Bi2O3 shield, dose reduction in 60, 80 and 100 kVp was 42%, 35% and 31%, respectively. A comparison between increasing energy from 60 to 100 kVp and dose reduction showed a significant reverse effect. Conclusion: The results indicate that the new shields containing nano Bi2O3 particles have a high X-rays attenuation ability but the attenuation property of the shields decreased by increasing the energy. Based on the results, this new shield can help social health and reduce the radiation risk.