X-Rays may not cause cancer after-all

In recent years, there has been an overwhelming number of scientific studies claiming that, imaging techniques like X-rays and CT scans are carcinogenic.

But such studies have serious flaws, including their reliance on an unproven statistical model, according to a recent research article co-written by Dr. James Welsh, a professor in the Department of Radiation Oncology at Loyola University and Dr Jeffrey Siegel, the president and CEO of Nuclear Physics Enterprises in Marlton, N.J .

The article questions the common use of a statistical model called “Linear No-Threshold” (LNT) in studies that have found a connection between medical imaging and cancer. LNT model works by taking the recognised carcinogenic effects of high doses of radiation and extrapolating downward to lower dose. It assumes there is no safe dose of radiation, no matter how small.

“Although radiation is known to cause cancer at high doses and high dose-rates, no data have ever unequivocally demonstrated the induction of cancer following exposure to low doses and dose rates,” writes Dr. Welsh.

Welsh further questions the validity of LNG model by citing two recent studies that suggested increased cancer risks from radiation associated with paediatric CT scans , and explains that these cancers were more likely due to conditions that prompted the CT scan in the first place, and have less to do with radiation exposure.