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Title: Survey of computed tomography scanners in Taiwan: Dose descriptors, dose guidance levels, and effective doses

Abstract

The IAEA and the ICRP recommended dose guidance levels for the most frequent computed tomography (CT) examinations to promote strategies for the optimization of radiation dose to CT patients. A national survey, including on-site measurements and questionnaires, was conducted in Taiwan in order to establish dose guidance levels and evaluate effective doses for CT. The beam quality and output and the phantom doses were measured for nine representative CT scanners. Questionnaire forms were completed by respondents from facilities of 146 CT scanners out of 285 total scanners. Information on patient, procedure, scanner, and technique for the head and body examinations was provided. The weighted computed tomography dose index (CTDI{sub w}), the dose length product (DLP), organ doses and effective dose were calculated using measured data, questionnaire information and Monte Carlo simulation results. A cost-effective analysis was applied to derive the dose guidance levels on CTDI{sub w} and DLP for several CT examinations. The mean effective dose{+-}standard deviation distributes from 1.6{+-}0.9 mSv for the routine head examination to 13{+-}11 mSv for the examination of liver, spleen, and pancreas. The surveyed results and the dose guidance levels were provided to the national authorities to develop quality control standards and protocols for CTmore » examinations.« less

Authors:
; ; ;  [1];  [2];  [2];  [2]
  1. Department of Medical Imaging and Radiological Sciences, Chung Shan Medical University, Taichung 402, Taiwan and Department of Radiology, Chung Shan Medical University Hospital, Taichung 402, Taiwan (China)
  2. (China)
Publication Date:
OSTI Identifier:
20951144
Resource Type:
Journal Article
Resource Relation:
Journal Name: Medical Physics; Journal Volume: 34; Journal Issue: 4; Other Information: DOI: 10.1118/1.2712412; (c) 2007 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; COMPUTERIZED SIMULATION; COMPUTERIZED TOMOGRAPHY; HEAD; IAEA; ICRP; LIVER; MONTE CARLO METHOD; OPTIMIZATION; PANCREAS; PATIENTS; PHANTOMS; QUALITY CONTROL; RADIATION DOSES; SPLEEN; TAIWAN

Citation Formats

Tsai, H. Y., Tung, C. J., Yu, C. C., Tyan, Y. S., Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 300, Taiwan, Department of Radiological Technology, Yuanpei University, Hsinchu 300, Taiwan, and Department of Radiology, Chung Shan Medical University Hospital, Taichung 402, Taiwan. Survey of computed tomography scanners in Taiwan: Dose descriptors, dose guidance levels, and effective doses. United States: N. p., 2007. Web. doi:10.1118/1.2712412.
Tsai, H. Y., Tung, C. J., Yu, C. C., Tyan, Y. S., Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 300, Taiwan, Department of Radiological Technology, Yuanpei University, Hsinchu 300, Taiwan, & Department of Radiology, Chung Shan Medical University Hospital, Taichung 402, Taiwan. Survey of computed tomography scanners in Taiwan: Dose descriptors, dose guidance levels, and effective doses. United States. doi:10.1118/1.2712412.
Tsai, H. Y., Tung, C. J., Yu, C. C., Tyan, Y. S., Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 300, Taiwan, Department of Radiological Technology, Yuanpei University, Hsinchu 300, Taiwan, and Department of Radiology, Chung Shan Medical University Hospital, Taichung 402, Taiwan. Sun . "Survey of computed tomography scanners in Taiwan: Dose descriptors, dose guidance levels, and effective doses". United States. doi:10.1118/1.2712412.
@article{osti_20951144,
title = {Survey of computed tomography scanners in Taiwan: Dose descriptors, dose guidance levels, and effective doses},
author = {Tsai, H. Y. and Tung, C. J. and Yu, C. C. and Tyan, Y. S. and Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 300, Taiwan and Department of Radiological Technology, Yuanpei University, Hsinchu 300, Taiwan and Department of Radiology, Chung Shan Medical University Hospital, Taichung 402, Taiwan},
abstractNote = {The IAEA and the ICRP recommended dose guidance levels for the most frequent computed tomography (CT) examinations to promote strategies for the optimization of radiation dose to CT patients. A national survey, including on-site measurements and questionnaires, was conducted in Taiwan in order to establish dose guidance levels and evaluate effective doses for CT. The beam quality and output and the phantom doses were measured for nine representative CT scanners. Questionnaire forms were completed by respondents from facilities of 146 CT scanners out of 285 total scanners. Information on patient, procedure, scanner, and technique for the head and body examinations was provided. The weighted computed tomography dose index (CTDI{sub w}), the dose length product (DLP), organ doses and effective dose were calculated using measured data, questionnaire information and Monte Carlo simulation results. A cost-effective analysis was applied to derive the dose guidance levels on CTDI{sub w} and DLP for several CT examinations. The mean effective dose{+-}standard deviation distributes from 1.6{+-}0.9 mSv for the routine head examination to 13{+-}11 mSv for the examination of liver, spleen, and pancreas. The surveyed results and the dose guidance levels were provided to the national authorities to develop quality control standards and protocols for CT examinations.},
doi = {10.1118/1.2712412},
journal = {Medical Physics},
number = 4,
volume = 34,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}