An Environmental Scan of the National and Provincial Diagnostic Reference Levels in Canada for Common Adult Computed Tomography Scans

Author:

Ferderbar Michelle Linda1,Doyle Thomas E.1,Samavi Reza2,Koff David3

Affiliation:

1. McMaster eHealth Program, McMaster University, Hamilton, Ontario, Canada

2. Department of Computing and Software, McMaster University, Hamilton, Ontario, Canada

3. Department of Radiology, McMaster University, Hamilton, Ontario, Canada

Abstract

Several regulatory bodies have agreed that low-dose radiation used in medical imaging is a weak carcinogen that follows a linear, non-threshold model of cancer risk. While avoiding radiation is the best course of action to mitigate risk, computed tomography (CT) scans are often critical for diagnosis. In addition to the as low as reasonably achievable principle, a more concrete method of dose reduction for common CT imaging exams is the use of a diagnostic reference level (DRL). This paper examines Canada's national DRL values from the recent CT survey and compares it to published provincial DRLs as well as the DRLs in the United Kingdom and the United States of America for the 3 most common CT exams: head, chest, and abdomen/pelvis. Canada compares well on the international scale, but it should consider using more electronic dose monitoring solutions to create a culture of dose optimization.

Publisher

SAGE Publications

Subject

Radiology Nuclear Medicine and imaging,General Medicine

Reference23 articles.

1. UNSCEAR. Report of the United Nations Scientific Committee on the Effects of Atomic Radiation: Fifty-sixth Session 2008 United Nations Publications 46

2. Solid Cancer Incidence in Atomic Bomb Survivors: 1958–1998

3. Canadian Association of Radiologists Radiation Protection Working Group: Automated Patient-Specific Dose Registries—What Are They and What Are They Good for?

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