Effectiveness of thyroid gland shielding in dental CBCT using a paediatric anthropomorphic phantom

The purpose of the study is to evaluate the effectiveness of thyroid shielding in dental CBCT examinations using a paediatric anthropomorphic phantom. An ATOM(®) 706-C anthropomorphic phantom (Computerized Imaging Reference Systems Inc., Norfolk, VA) representing a 10-year-old child was loaded with...

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Published in:Dento-maxillo-facial radiology 2015-03, Vol.44 (3), p.20140285-20140285
Main Authors: Hidalgo, A, Davies, J, Horner, K, Theodorakou, C
Format: Article
Language:English
Subjects:
Child
Cone-Beam Computed Tomography
Dentistry
Humans
Phantoms, Imaging
Radiation Dosage
Radiation Protection - instrumentation
Thermoluminescent Dosimetry
Thyroid Gland - radiation effects
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cited_by cdi_FETCH-LOGICAL-c387t-b23249e13d14c19a30260bcf8695f7cd359217c5872426359340eda49ad128723
cites cdi_FETCH-LOGICAL-c387t-b23249e13d14c19a30260bcf8695f7cd359217c5872426359340eda49ad128723
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container_title Dento-maxillo-facial radiology
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creator Hidalgo, A
Davies, J
Horner, K
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description The purpose of the study is to evaluate the effectiveness of thyroid shielding in dental CBCT examinations using a paediatric anthropomorphic phantom. An ATOM(®) 706-C anthropomorphic phantom (Computerized Imaging Reference Systems Inc., Norfolk, VA) representing a 10-year-old child was loaded with six thermoluminescent dosemeters positioned at the level of the thyroid gland. Absorbed doses to the thyroid were measured for five commercially available thyroid shields using a large field of view (FOV). A statistically significant thyroid gland dose reduction was found using thyroid shielding for paediatric CBCT examinations for a large FOV. In addition, a statistically significant difference in thyroid gland doses was found depending on the position of the thyroid gland. There was little difference in the effectiveness of thyroid shielding when using a lead vs a lead-equivalent thyroid shield. Similar dose reduction was found using 0.25- and 0.50-mm lead-equivalent thyroid shields. Thyroid shields are to be recommended when undertaking large FOV CBCT examinations on young patients.
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language eng
recordid cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_4614166
source Oxford Journals Online
subjects Child
Cone-Beam Computed Tomography
Dentistry
Humans
Phantoms, Imaging
Radiation Dosage
Radiation Protection - instrumentation
Thermoluminescent Dosimetry
Thyroid Gland - radiation effects
title Effectiveness of thyroid gland shielding in dental CBCT using a paediatric anthropomorphic phantom
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