0
Editorial |

Calcium Scoring With Computed Tomography:  What Is the Radiation Risk?

Raymond J. Gibbons, MD; Thomas C. Gerber, MD, PhD
Arch Intern Med. 2009;169(13):1185-1187. doi:10.1001/archinternmed.2009.190.
Text Size: A A A
Published online

Extract

The critical appraisal of any medical test or strategy requires careful assessment of its potential risks, benefits, and costs. Accurate definition of the risks, benefits, and costs of the use of coronary artery calcium (CAC) scanning with computed tomography (CT) in asymptomatic individuals remains an elusive goal. In this issue of the Archives, Kim et al1 contribute to our knowledge about potential risks by reporting estimated radiation doses and excess lifetime risks of radiation-induced cancer from CAC scanning for a variety of CT scanners and scanning protocols that have been described in the literature. The authors report more than a 10-fold variation in effective radiation dose, from 0.8 to 10.5 mSv, with a median of 2.3 mSv. The data reflect well-established relationships between the specifics of CT scanner settings such as x-ray tube potential or tube current-time product on the one hand and radiation exposure and dose on the other.2 For their median radiation dose, Kim and colleagues estimate a lifetime excess cancer risk from a single examination at the age of 40 years of 9 cancers per 100 000 men and 28 cancers per 100 000 women.

Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours

First Page Preview

View Large
/>
First page PDF preview

Figures

Tables

References

Correspondence

CME
Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).
Submit a Comment

Multimedia

Some tools below are only available to our subscribers or users with an online account.

Web of Science® Times Cited: 5

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.

See Also...
Articles Related By Topic
Related Topics
PubMed Articles
Does methamphetamine affect bone metabolism? Toxicology Published online Feb 26, 2014.;
Coronary Artery Calcium Score: A Review. Iran Red Crescent Med J 2013;15(12):e16616.
Jobs
brightcove.createExperiences();