Evaluation of Effective Dose using TLDs With Different Weighted PMMA Phantoms Undergoing Coronary Artery Calcium Computed Tomography Examination

Author

Sung-Yi Tsai ; Chien-Yi Chen ; Jhih-Shian Lee ; Jyh-Cheng Chen

Author_Institution

Dept. of Med. Imaging, St. Martin De Porres Hosp., Chiayi, Taiwan

Volume

60

Issue

3

fYear

2013

fDate

Jun-13

Firstpage

2147

Lastpage

2154

Abstract

Objective: A reliable system is necessary for conducting effective dose (E) assessments for diagnosing coronary artery calcium (CAC) for patients with different weights undergoing computed tomography (CT) examination. Materials and Methods: A method has been designed to correlate effective dose and body weight using Rando and polymethylmethacrylate (PMMA) phantoms ranging from 10 to 90 kg. PMMA phantoms were derived from ICRU 48. All scans were conducted on the Toshiba 64-detector row CT scanner with fixed exposure conditions. E was measured in the organs and tissues of interest using thermoluminescent dosemeters (TLDs) and recommended by ICRP 103. Results: E of these phantoms was estimated. The E decreased exponentially in an inverse correlation with increasing patient weight. Conclusion: A simple equation of effective dose relative to different body weight was fitted and can be used as advisory for radiation protection and assessment in Taiwan.

Keywords

biological organs; blood vessels; computerised tomography; dosimetry; phantoms; radiation protection; thermoluminescent dosimeters; ICRP 103; ICRU 48; Rando and polymethylmethacrylate phantoms; Taiwan; Toshiba 64-detector row CT scanner; body weight; coronary artery calcium computed tomography examination; effective dose assessments; fixed exposure conditions; mass 10 kg to 90 kg; organs; patient weight; patients; radiation protection; thermoluminescent dosemeters; tissues; weighted PMMA phantoms; Arteries; Calcium; Computed tomography; Lungs; Phantoms; Photonics; Computed tomography (CT); coronary artery calcium (CAC); indigenous polymethylmethacrylate (PMMA) phantoms; thermoluminescent dosemeter (TLD);

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2013.2258175

Filename

6518173