Searching for just a few words should be enough to get started. If you need to make more complex queries, use the tips below to guide you.
Article type: Research Article
Authors: Karim, M.K.A.a; * | Rahim, N.A.b | Matsubara, K.c | Hashim, S.d | Mhareb, M.H.A.e | Musa, Y.d
Affiliations: [a] Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia | [b] Department of Radiology, National Cancer Institute, Precint 7, 62250 Putrajaya, Malaysia | [c] Department of Quantum Medical Technology, Faculty of Health Sciences, Kanazawa University, Japan | [d] Department of Physics, Faculty of Science, Universiti Teknologi Malaysia Johor Baru, Malaysia | [e] Department of Physics, College of Science, Imam Abdurrahman Bin Faisal University, Saudi Arabia, City Dammam, Saudi Arabia
Correspondence: [*] Corresponding author: M.K.A. Karim, Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia. E-mail: [email protected].
Abstract: BACKGROUND:Numerous techniques had been proposed to reduce radiation exposure in computed tomography (CT) including the use of radiation shielding. OBJECTIVE: This study aims to evaluate efficacy of using a bismuth breast shield and optimized scanning parameter to reduce breast absorbed doses from CT thorax examination. METHODS:Five protocols comprising the standard CT thorax clinical protocol (CP1) and four modified protocols (CP2 to CP5) were applied in anthropomorphic phantom scans. The phantom was configured as a female by placing a breast component on the chest. The breast component was divided into four quadrants, where 2 thermoluminescence dosimeters (TLD-100) were inserted into each quadrant to measure the absorbed dose. The bismuth shield was placed over the breast component during CP4 and CP5 scans. RESULTS:The pattern of absorbed doses in each breast and quadrant were approximately the same for all protocols, where the 4th quadrant > 3rd quadrant > 2nd quadrant > 1st quadrant. The mean absorbed dose value in CP3 was reduced to almost 34% of CP1’s mean absorbed dose. It was reduced even lower to 15% of CP1’s mean absorbed dose when the breast shield was used in CP5. CONCLUSION:This study showed that CT radiation exposure on the breast could be reduced by using a bismuth shield and low tube potential protocol without compromising the image quality.
Keywords: Computed tomography, bismuth shielding, organ equivalent dose, scan protocols, tube potential, breast
DOI: 10.3233/XST-180397
Journal: Journal of X-Ray Science and Technology, vol. 27, no. 1, pp. 139-147, 2019
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
USA
Tel: +1 703 830 6300
Fax: +1 703 830 2300
[email protected]
For editorial issues, like the status of your submitted paper or proposals, write to [email protected]
IOS Press
Nieuwe Hemweg 6B
1013 BG Amsterdam
The Netherlands
Tel: +31 20 688 3355
Fax: +31 20 687 0091
[email protected]
For editorial issues, permissions, book requests, submissions and proceedings, contact the Amsterdam office [email protected]
Inspirees International (China Office)
Ciyunsi Beili 207(CapitaLand), Bld 1, 7-901
100025, Beijing
China
Free service line: 400 661 8717
Fax: +86 10 8446 7947
[email protected]
For editorial issues, like the status of your submitted paper or proposals, write to [email protected]
如果您在出版方面需要帮助或有任何建, 件至: [email protected]