Population dose from medical exposure in Taiwan for 2008

Chen, Tou-Rong; Tyan, Yeu Sheng; Teng, P. S.; Chou, Jason; Yeh, Chun‐Nan; Shao, C. H.; Tung, Chuan–Jong

doi:10.1118/1.3592936

Cited by 18 publications

(17 citation statements)

References 9 publications

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“…Second, we determined that the upper third quartile value (0.311 mSv) of the effective dose is the cut-off value of a high effective dose as there are no previously defined highly effective doses for abdominal digital radiography. Moreover, the upper third quartile value of the effective dose assessed in our study was lower than the mean effective dose reported in other studies (0.44-1.5 mSv) (19,(23)(24)(25)(26).…”

Section: Discussioncontrasting

confidence: 87%

Effective Dose in Abdominal Digital Radiography: Patient Factors

Jang

Koo

Yang

et al. 2017

J Korean Soc Radiol

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Section: Discussioncontrasting

confidence: 87%

Effective Dose in Abdominal Digital Radiography: Patient Factors

Jang

Koo

Yang

et al. 2017

J Korean Soc Radiol

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“…The annual effective dose attributed to natural background radiation was about 1.62 mSv [3], and to medical exposures, about 0.74 mSv in Taiwan for 2008 [4]. In 2008, the frequency of CT examinations accounted for only 4.7% of total medical exposures, but the corresponding contribution to the effective dose was as high as 50.8% [4].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In 2008, the frequency of CT examinations accounted for only 4.7% of total medical exposures, but the corresponding contribution to the effective dose was as high as 50.8% [4]. However, the study assumed a CT examination on a patient consisting of a single CT scan, where a scan refers to a single sequence of rotations [4]. Because some CT procedures consist of two or more scans and patients may undergo multiple repeat procedures, estimating the collective effective dose requires estimating the number of scans associated with these procedures.…”

Section: Introductionmentioning

confidence: 99%

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The Population Effective Dose of Medical Computed Tomography Examinations in Taiwan for 2013

Yeh¹,

Tsai²,

Tyan³

et al. 2016

PLoS ONE

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PurposeTo evaluate the annual effective dose per capita attributed to computed tomography (CT) examinations in 2013 and to predict the population effective dose from 2000 to 2013 in Taiwan.MethodsA CT examination database collected from 30 hospitals was divided into 22 procedures and classified into six regions: head, neck, chest, abdomen, pelvis, and other, respectively. The effective doses in different regions were evaluated by dose-length product (DLP) multiplied by conversion factors.ResultsThe CT scan dose parameters were collected from 4,407 patients. For the six scanned regions, the percentages of patients scanned were: head (39.8%), neck (3.9%), chest (23.3%), abdomen (26.7%), pelvis (4.8%), and other (1.6%), respectively. The DLPs per patient (mGy·cm/patient) were head (1,071±225), neck (1,103±615), chest (724±509), abdomen (1,315±550), pelvis (1,231±620) and other (1,407±937), respectively. The number of CT examinations increased rapidly, with an average annual growth rate of 7.6%. The number of CT examinations in 2013 was 2.6 times that in 2000. The population effective dose was 0.30 mSv per capita in 2000 and increased to 0.74 mSv per capita in 2013, with an annual growth rate of 7.2%. The growth trend indicates that the effective dose will continue to rise in Taiwan.ConclusionSome strategies should be applied to cope with this growth. Defining the CT dose reference level stipulated in official recommendations and encouraging the use of iterative reconstruction imaging instead of filtered back-projection imaging could be a useful method for optimizing the effective dose and image quality.

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“…It is an unique mandatory health-care system with approximately 100% of the Taiwanese population are enrolled, and covers the vast majority of medical radiation procedures (Chen et al, 2011). A large amount of health-care data are completely collected in the National Health Insurance Research Database (NHIRD).…”

Section: Introductionmentioning

confidence: 99%

Cancer Risk from Medical Radiation Procedures for Coronary Artery Disease: A Nationwide Population-based Cohort Study

Hung

Hwang²

2013

Asian Pacific Journal of Cancer Prevention

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To assess the risk of cancer incidence after medical radiation exposure for coronary artery disease (CAD), a retrospective cohort study was conducted based on Taiwan's National Health Insurance Research Database (NHIRD). Patients with CAD were identified according to the International Classification of Diseases code, 9th Revision, Clinical Modification (ICD-9-CM), and their records of medical radiation procedures were collected from 1997 to 2010. A total of 18,697 subjects with radiation exposure from cardiac imaging or therapeutic procedures for CAD were enrolled, and 19,109 subjects receiving cardiac diagnostic procedures without radiation were adopted as the control group. The distributions of age and gender were similar between the two populations. Cancer risks were evaluated by age-adjusted incidence rate ratio (aIRR) and association with cumulative exposure were further evaluated with relative risks by Poisson regression analysis. A total of 954 and 885 subjects with various types of cancers in both cohorts after following up for over 10 years were found, with incidences of 409.8 and 388.0 per 100,000 person-years, respectively. The risk of breast cancer (aIRR=1.85, 95% confidence interval: 1.14-3.00) was significantly elevated in the exposed female subjects, but no significant cancer risk was found in the exposed males. In addition, cancer risks of the breast and lung were increased with the exposure level. The study suggests that radiation exposure from cardiac imaging or therapeutic procedures for CAD may be associated with the increased risk of breast and lung cancers in CAD patients.Keywords: Coronary artery disease (CAD) -cardiac imaging -cancer risk -incidence rate ratio (IRR)

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Population dose from medical exposure in Taiwan for 2008

Cited by 18 publications

References 9 publications

Effective Dose in Abdominal Digital Radiography: Patient Factors

Effective Dose in Abdominal Digital Radiography: Patient Factors

The Population Effective Dose of Medical Computed Tomography Examinations in Taiwan for 2013

Cancer Risk from Medical Radiation Procedures for Coronary Artery Disease: A Nationwide Population-based Cohort Study

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