Analysis of thyroid absorbed dose in cervical CT scan with the use of bismuth shielding

The Computed Tomography (CT) has become an important tool to diagnose cancer and to obtain additional information for different clinical questions. Today, it is a very fast, painless and noninvasive test that can be performed high quality images. However, CT scan usually requires a higher radiation...

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Bibliographic Details
Published in:Brazilian Journal of Radiation Sciences 2019-02, Vol.7 (2A)
Main Authors: Santos, Fernanda Stephanie, Gomez, Alvaro Mauricio Ladino, Silva, Clarysson Alberto Melo da, Santana, Priscila Do Carmo, Mourao, Arnaldo Prata
Format: Article
Language:English
Subjects:
Bismuth shielding
Computed Tomography
Dosimetry
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Summary:The Computed Tomography (CT) has become an important tool to diagnose cancer and to obtain additional information for different clinical questions. Today, it is a very fast, painless and noninvasive test that can be performed high quality images. However, CT scan usually requires a higher radiation exposure dose than a conventional radiography examination. The aim of this study is to determine the dose variation deposited in thyroid and in nearby radiosensitive organs, such as: lenses, pharynx, hypophysis, salivary gland and spinal cord with and without the use of bismuth shielded. A cervical CT scan was performed on anthropomorphic male phantom model Alderson Rando, using a GE scanner, Discovery model with 64 channels. 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 thyroid received the highest dose, 24.70 mGy, in the phantom, according to the incidence of the primary X-ray beam.
ISSN:2319-0612
2319-0612
DOI:10.15392/bjrs.v7i2A.614