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Protection of superficial organs using bismuth and iodine shielding during computed tomography in phantoms

  • Original Paper - Cross-Disciplinary Physics and Related Areas of Science and Technology
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Abstract

We sought to minimize streak artifacts caused by beam hardening on chest CT scan, obtain high-quality CT images and compare image quality and dose between with and without iodine and bismuth shielding material to protect superficial organs. During CT, the radiation dose was measured and the images evaluated before using the shielding material, iodine and bismuth. A body phantom of polymethyl methacrylate (PMMA) measuring 32 cm was used for image quality and radiation dose measurement according to the shielding material of the CT scan. During CT, phantom noise was measured to be 11.49 HU without shielding, 12.95 HU with bismuth, and 14.67 HU with iodine (p > 0.05). Based on the dose, in the absence of the shielding material, the shielding with iodine showed a dose reduction effect of 40.64% at 11 o'clock and 35.74% at 1 o'clock. In the case of bismuth shielding, the dose at 11 o'clock was decreased to 34.06% and the dose at 1 o'clock was decreased to 34.32%. Dose reduction was observed prior to the use of the shielding material and the application of the iodine and bismuth shielding materials (p < 0.05). In phantom chest CT, the dose reduction of the superficial organs using iodine and bismuth, a radiation shielding material, was confirmed.

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Authors and Affiliations

  1. Department of Radiological Science, Shinhan University, Uijeongbu, 11644, Republic of Korea

    Dae Cheol Kweon

  2. Department of Radiology, Kyung Hee University Hospital at Gang-Dong, Seoul, 05278, Republic of Korea

    Jong-Woong Lee

  3. Department of Radiological Science, Jeonju University, Jeonju, 55069, Republic of Korea

    Jiwon Choi

  4. Department of Radiologic Science, Jeonju University, 303, Cheonjam-ro, Wansan-gu, Jeonju, Jeollabuk-do, 55069, Republic of Korea

    Jiwon Choi

Authors
  1. Dae Cheol Kweon
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  2. Jong-Woong Lee
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Correspondence to Jiwon Choi.

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Kweon, D.C., Lee, JW. & Choi, J. Protection of superficial organs using bismuth and iodine shielding during computed tomography in phantoms. J. Korean Phys. Soc. 81, 59–67 (2022). https://doi.org/10.1007/s40042-022-00482-2

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  • DOI: https://doi.org/10.1007/s40042-022-00482-2

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