Analysis of lenses absorbed dose in head CT scan with the use of bismuth shielding

Authors

  • Fernanda Stephanie Santos Federal University of Minas Gerais
  • Priscila do Carmo Santana Federal University of Minas Gerais
  • Arnaldo Prata Mourão Federal University of Minas Gerais Federal Center for Technological Education of Minas Gerais

DOI:

https://doi.org/10.15392/bjrs.v6i2A.446

Keywords:

Computed Tomography, Dosimetry, Bismuth shielding.

Abstract

Computed Tomography (CT) has become an important tool to diagnose cancer and to obtain additional information for different clinical questions. However, CT scan usually requires a higher radiation exposure than a conventional radiography examination. Head CT scans are used for diagnosis of traumatic head injuries, infections and other diseases with instability. Based on this information, it was studied the dose variation deposited in the lenses and in nearby organs, such as: pharynx, hypophysis and salivary gland with and without the use of bismuth shield. In this study a head CT scan was performed on anthropomorphic male phantom using a GE scanner. Dose measurements have been performed by using radiochromic film strips to register the individual doses in the organs of interest. The results show us that the lenses had a reduction of 26% of the dose with the use of the bismuth shield.

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Author Biographies

  • Fernanda Stephanie Santos, Federal University of Minas Gerais
    Nuclear Engineer Department at UFMG
  • Priscila do Carmo Santana, Federal University of Minas Gerais
    Department of Image and Anatomy
  • Arnaldo Prata Mourão, Federal University of Minas Gerais Federal Center for Technological Education of Minas Gerais

    Department of Nuclear Engineer

    Biomedical Engineering Center

References

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Published

2018-07-19

How to Cite

Analysis of lenses absorbed dose in head CT scan with the use of bismuth shielding. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 6, n. 2A (Suppl.), 2018. DOI: 10.15392/bjrs.v6i2A.446. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/446.. Acesso em: 22 nov. 2024.

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