Please use this identifier to cite or link to this item: https://doi.org/10.1002/jmrs.210
Title: Establishment of institutional diagnostic reference level for computed tomography with automated dose-tracking software
Authors: Liang C.R.
Chen P.X.H.
Kapur J. 
Ong M.K.L.
Quek S.T. 
Kapur S.C.
Keywords: CT dose index
diagnostic reference level
dose-length product
effective dose
Issue Date: 2017
Publisher: John Wiley and Sons Ltd
Citation: Liang C.R., Chen P.X.H., Kapur J., Ong M.K.L., Quek S.T., Kapur S.C. (2017). Establishment of institutional diagnostic reference level for computed tomography with automated dose-tracking software. Journal of Medical Radiation Sciences 64 (2) : 82 - 89. ScholarBank@NUS Repository. https://doi.org/10.1002/jmrs.210
Rights: CC0 1.0 Universal
Abstract: Introduction: The aim of this study was to establish institutional diagnostic reference levels (DRLs) by summarising doses collected across the five computed tomography (CT) system in our institution. Methods: CT dose data of 15940 patients were collected retrospectively from May 2015 to October 2015 in five institutional scanners. The mean, 75th percentile and 90th percentile of the dose spread were calculated according to anatomic region. The common CT examinations such as head, chest, combined abdomen/pelvis (A/P), and combined chest/abdomen/pelvis (C/A/P) were reviewed. Distribution of CT dose index (CTDIvol), dose-length product (DLP) and effective dose (ED) were extracted from the data for single-phasic and multiphasic examinations. Results: The institutional DRL for our CT units were established as mean (50th percentile) of CTDIvol (mGy), DLP (mGy.cm) and ED (mSv) for single and multiphasic studies using the dose-tracking software. In single phasic examination, Head: (49.0 mGy), (978.0 mGy.cm), (2.4 mSv) respectively; Chest: (6.0 mGy), (254.0 mGy.cm), (4.9 mSv) respectively; CT A/P (10.0 mGy), (514.0 mGy.cm), (8.9 mSv) respectively; CT C/A/P (10.0 mGy), (674.0 mGy.cm), (11.8 mSv) respectively. In multiphasic studies: Head (45.0 mGy), (1822.0 mGy.cm), (5.0 mSv) respectively; Chest (8.0 mGy), (577.0 mGy.cm), (10.0 mSv) respectively; CT A/P: (10.0 mGy), (1153.0 mGy.cm), (20.2 mSv) respectively; CT C/A/P: (11.0 mGy), (1090.0 mGy.cm), (19.2 mSv) respectively. Conclusions: The reported metrics offer a variety of information that institutions can use for quality improvement activities. The variations in dose between scanners suggest a large potential for optimisation of radiation dose. © 2017 The Authors. Journal of Medical Radiation Sciences published by John Wiley & Sons Australia, Ltd on behalf of Australian Society of Medical Imaging and Radiation Therapy and New Zealand Institute of Medical Radiation Technology.
Source Title: Journal of Medical Radiation Sciences
URI: https://scholarbank.nus.edu.sg/handle/10635/184382
ISSN: 20513895
DOI: 10.1002/jmrs.210
Rights: CC0 1.0 Universal
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