International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1398
3
1
gregorian
2019
6
1
17
3
online
1
fulltext
en
Designing and construction of breast shields using silicone composite of Bismuth for chest CT
Radiation Biology
Radiation Biology
یادداشت فنی
Technical Note
<div style="text-align: justify;">Background: Bismuth composites are new and non-lead shields that are capable of breast dose reduction while preserving image quality. In this study, different percentages of Bismuth were used in designing and constructing polymer composites as breast shields in chest CT. Materials and Methods: Micro particles of Bismuth with a ratio of 1% to 15% in Silicone matrix with two thicknesses were used as Bismuth Silicone composite (BSC) shield. The female chest phantom and standard chest CT exposure factors were used. Dosimetry was performed by thermo luminescent dosimeters. The image quality was evaluated with two methods. Statistical analyses were performed by Kruskal-Wallis and Mann-Whitney tests using SPSS 16. Results: The application of 1% and 15% BSC shields reduced the breast dose to 14.9% and 62.2%, respectively. Increases in image noise in BSC was observed 2.33% (P=0.439) for breast and from 7.13% (p=0.513) for mediastinum areas, depending on the type of shields. Conclusion: The Application of Bismuth shields with Silicone composite and changing of the Bismuth percentages in composite and thickness are effective factors on the breast dose reduction significantly that can reduce the risk of breast cancer when engaged in Chest CT.</div>
Breast shield, Chest CT, Bismuth Silicone construction.
499
504
http://ijrr.com/browse.php?a_code=A-10-1-809&slc_lang=en&sid=1
P.
Mehnati
7900319475328460014322
7900319475328460014322
No
Medical Radiation Sciences Research team, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
M.
Arash
arash.mehran556@gmail.com
7900319475328460014323
7900319475328460014323
Yes
Medical Radiation Sciences Research team, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
M.S.
Zakerhamidi
7900319475328460014324
7900319475328460014324
No
Research Institute for Applied Physics and Astronomy, Tabriz University, Tabriz, Iran
M.
Ghavami
7900319475328460014325
7900319475328460014325
No
Department of Radiology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran