Yes; these authors should study modern radiobiology.
Liu S-Z. 2003. Nonlinear Dose-Response Relationship in the Immune System Following Exposure to Ionizing Radiation: Mechanisms and Implications. Nonlinearity in Biology, Toxicology and Medicine 1(1): 71-92. Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2651616/
Liu S-Z. 2007. Cancer Control Related to Stimulation of Immunity by Low-Dose Radiation. Dose-Response 5: 39-47. Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2477702/
--- On Tue, 2/8/11, Leo M. Lowe <email@example.com> wrote:
From: Leo M. Lowe <firstname.lastname@example.org>
Subject: [cdn-nucl-l] Increase in Cancer Risk due to Cardiac Imaging
Date: Tuesday, February 8, 2011, 3:28 PM
A recent study on cardiac imaging of heart attack patients by Eisenberg et al. in the journal of the Canadian Medical Association (7Feb2011) reports a dose response and a cancer risk of 3% per 10 mSv dose in patients. This seems extremely high.
See the CBC report at http://www.cbc.ca/health/story/2011/02/07/heart-cancer-radiation-tests.html
Leo M. Lowe, Ph.D., P.Phys., CRadP