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Thursday December 17, 10:18

X-ray scanners responsible for cancer

Medical imaging: radiation scanners responsible for cancer
Medical imaging: radiation scanners responsible for cancer
 

The radiation emitted by the scanners used for making medical images could be responsible for thousands of cancer cases that appear years later, two studies published in the American journal Archives of Internal Medicine show.

The scanners can rebuild an organ or tissue in three dimensions using a scanning X-ray.

The first study, led by Dr. Rebecca Smith-Bindman (California, western United States), showed that radiation doses of the 19,500 CT exams performed each year ranged from 1 to 13, according to machine used.

The average dose received by a patient is four times higher than what it should be. Irradiation of a patient when taking a scan of a coronary artery, for example, reached the equivalent of 309 lung photofluorograms.

According to this study, 40 out of 270 women who underwent a scan of the coronary arteries develop cancer because of this review.

The second study, conducted by Dr. Amy Berrington de Gonzalez, concludes that 72 million scans performed in the United States in 2007 will result in 29,000 additional cases of cancer.

The cancer appear 20 to 30 years after the procedure. According to the specialists, these types of cancer are particularly deadly. The survival rate of patients would only reach 50%.

 
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