Is computed tomography harmful to health?
Performing a CT scan damages the patient's DNA
Copper news based on the materials of Science Daily: DNA damage seen in patients undergoing CT scanning, study findsStanford University staff reported that performing computed tomography (CT) causes DNA damage.
The authors of the study analyzed blood samples from 67 volunteers before and after they underwent CT angiography. This method is used by doctors to obtain a detailed image of the patient's blood vessels. Scientists have sequenced the genome of all volunteers. In addition, in order to assess the degree of DNA damage, the authors of the study used the method of flow cytometry.
According to data presented in the Journal of the American College of Cardiology: Cardiovascular Imaging, CT scans increase the frequency of DNA damage. In addition, scientists have recorded an increased expression of genes responsible for cell repair and cell death. According to the authors of the study, the radiation dose during CT was 120 times higher than during a single chest X-ray examination.
"Now we know that exposure to even small doses of radiation, which occurs during computed tomography, is associated with cell damage. While we cannot say whether this increases the risk of developing diseases such as cancer, however, the results should encourage doctors to consider reducing the radiation dose," explained study co–author Patricia Nguyen.
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28.07.2015