Small doses of radiation to which patients undergo imaging tests such as X-rays, CT scans and scans can not have harmful effect on the increase in cases of cancer. In fact, this reduced exposure could backfire by strengthening cellular repair mechanisms of the body and reducing the risk of cancer. It suggests that a recent article by the journal Technology in Cancer Research & Treatment.
According to the Nuclear Medicine and director of clinical specialist MND Campinas, Celso Darío Ramos, a study conducted jointly by physical and American doctors presents a new perspective in understanding the effects of small doses of radiation in the body.
“The authors discuss the validity of the model used in most recent studies for the measurement of radiation doses, called the Non-Linear Model Threshold (LNT), something like” without linear model response threshold radiation dose. ” Basically, this type of measurement assumes that cancer can result from a single ionization of a critical cell, concluding that there would be no safe dosage for radiation use, “he explains.
The expert states that the natural process of cell reproduction body routine is responsible for thousands of DNA mutations every day. Because of this, there are repair mechanisms of these structures, preventing these changes cause cancer.
The linear model put into question the study does not take into account this basic mechanism of the organism, something vital for a more complete understanding of the effects of radiation. According to the article, small doses of radiation used in the tests would help prevent some cancers exactly ‘exercise’ this repair mechanism with safe amounts of mutation.
Fear of the unknown
Another point raised by the researchers concerns radiophobia, exaggerated fear of radiation effects. According to the study, the exaggerated reaction of fear of the people against disasters like Fukushima, in 2011, can be more lethal than exposure to radioactivity itself.
The article points out that Japan recorded about a thousand deaths caused due to the forced evacuations, while exposure to radiation itself did not cause any direct effect on the health of the population. The researchers also look to other data that can not be estimated, but that are common in cases like that of Fukushima, as the number of suicides and even unnecessary abortions caused by radiophobia.
Radioactivity for health
According to Director of MND Campinas, this same fear of radiation is present in the daily life of nuclear medicine, specialty that uses small amounts of radioactive substances (radiopharmaceuticals) as a tool for accurate diagnosis and offer treatment. Using these elements, the nuclear physician can obtain detailed images that show how the organs of the human body and its tissues and running.
“There is a fear when procedures involving radioactive elements. This is due mainly to the lack of knowledge. The amount of radiation involved is very small and uses very short half-life of radioisotopes, are rapidly removed from the body. These factors make the diagnosis of safer nuclear medicine than many more invasive and less accurate tests, “said Ramos.
Among the areas of specialty performance, are the diagnosis and treatment of various cancers, chronic diseases such as cardiovascular and kidney, changes in thyroid and neuroendocrine tumors.
About MND Campinas
Founded in 1995, the Nuclear Medicine Diagnostic Campinas unites a team of professional pioneers in PET / CT in Brazil, one of the major advances of the specialty. The clinic offers medical and patient services in diagnostic imaging, bringing the very latest in nuclear medicine. The clinic has the distinction of training of clinical staff with medical, biomedical and nurses in constant improvement process to monitor the progress of the specialty.