Assessment of breast absorbed doses during thoracic computed tomography scan to evaluate the effectiveness of bismuth shielding.

Authors :: Alonso TC
Mourão AP
Santana PC
da Silva TA
Source :: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2016 Nov; Vol. 117, pp. 55-57. Date of Electronic Publication: 2016 Mar 19.
Publication Year :: 2016
Abstract: During a lung computed tomography (CT) examination, breast and nearby radiosensitive organs are unnecessarily irradiated because they are in the path of the primary beam. The purpose of this paper is to determine the absorbed dose in breast and nearby organs for unshielded and shielded exposures with bismuth. The experiment was done with a female anthropomorphic phantom undergoing a typical thoracic CT scan, with TLD-100 thermoluminescent detectors insert at breast, lung and thyroid positions. Results showed that dose reduction due to bismuth shielding was approximately 30% and 50% for breast and thyroid, respectively; however, the influence of the bismuth on the image quality needs to be considered.<br /> (Copyright © 2016 Elsevier Ltd. All rights reserved.)

Subjects :: Breast radiation effects
Equipment Design
Female
Humans
Organs at Risk radiation effects
Phantoms, Imaging
Radiation Dosage
Radiation Protection methods
Absorption, Radiation physiology
Bismuth chemistry
Breast physiology
Radiation Exposure analysis
Radiation Protection instrumentation
Radiography, Thoracic methods
Tomography, X-Ray Computed methods

Language :: English
ISSN :: 1872-9800
Volume :: 117
Database :: MEDLINE
Journal :: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
Publication Type :: Academic Journal
Accession number :: 27033028
Full Text :: https://doi.org/10.1016/j.apradiso.2016.03.018

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