Title : CT Scans: Exposing Your Body to 1000x the Radiation of a Standard X-Ray
link : CT Scans: Exposing Your Body to 1000x the Radiation of a Standard X-Ray
CT Scans: Exposing Your Body to 1000x the Radiation of a Standard X-Ray
Doctors have always assumed, however, that the benefits outweigh the risks. X-rays, which revolve around the head, chest or other part of the body, help create a three-dimensional image that is much more detailed than those received from a standard X-ray machine.
But one CT scan subjects the human body to between 150 and 1,100 times the radiation of a conventional radiography, or around a value of exposure to radiation from natural and artificial sources in the environment of a year.
A study Journal of Medical Sciences of Korea showed that some patients with intestinal disorders Crohn's disease and other are receiving effective doses accumulated over 75mSv (microsieverts).
1mSv dose is produced by exposure to 1 milligray (mg) of radiation. 10 mSv is equivalent to 1 rem or 1 rad. If we compare the doses of these patients were receiving to that of conventional X-rays of the extremities (.001mSv) there is a profound increase in exposure. This amount of radiation exposure has been definitively linked to increased cancer mortality.
A handful of studies published in the last decade have rekindled concerns cancer risk. Researchers at the National Cancer Institute estimates that 29,000 cases of future cancer could be attributed to the millions of CT scans performed.
This increase is linked to a growing cancers diagnosed each year nationwide percentage. A 2009 study of medical centers in the area of San Francisco also calculates a high risk :. An additional case of cancer for every 400 to 2,000 CT exams routine chest
The annual average radiation environmental exposure is about 3000mSv. A CT scan of the abdomen is equal to 15,000mSv. That's 5 times the annual dose of exposure in a single session.
The radiation dose of more than 5000 mrem / year is not considered safe, regardless of the source. You can use our radiation dose calculator to measure the amounts that you are exposed to year.
About 25,000 survivors of the atomic bombs were exposed to relatively low doses comparable to between one and three CT scans radiation. The number of cancer cases that developed during the rest of their lives is not yet large enough to provide the statistical power to reliably predict the risk of cancer associated with CT in the general population today .
Given these difficulties, as well as new concerns about radiation levels and the lack of mandatory standards for safe CT exposure (in contrast to procedures such as mammography), a dozen research groups around the world they have decided to re-evaluate the radiation risk of CT based on the most comprehensive evidence.
An increasing number of doctors and medical associations are not waiting for the final results on the health risks and have already begun to find ways to reduce radiation levels.
Two radiologists Massachusetts General Hospital, for example, think they can reduce the dose of X-rays of at least one common type of CT in 75 percent without significantly reducing image quality. Similarly, some medical associations are trying to limit unnecessary clinical picture and prevent the use of too much radiation when the CT scan is necessary.
unsafe at any dose
Radiation can cause an increase in incidence, but not necessarily of gravity, of malignant disease (eg, cancer). For this kind of effect, it is the probability of occurrence increases with dose rather than gravity.
For reasons of radiation protection it is assumed that any dose above zero can increase the risk of radiation-induced cancer (ie, that there is no threshold). Epidemiological studies have found that the risk of estimated lifetime of dying of cancer is higher by approximately 0.004% per mSv (0.04% by REM) of the radiation dose to the whole body (NRC, 1990). "
doctors say that the amount of radiation emitted from a regular x-ray doctors is so low that there is no risk of cancer. This goes against data showing that any amount of radiation inflicts radical damage free DNA that negatively affects our genes.
radiation-induced cancers occur in response to mutations in genes that regulate cell proliferation. radiation-induced cancers have tripled in the last two decades and diagnosis imaging already been admitted as a cause for the US government ..
according to a study of seven health systems in the United States, the use of computed tomography (CT) head, abdomen / pelvis, chest or spine in children under 14 more than doubled between 1996 and 2005, and is associated radiation is projected to potentially increase the risk of radiation-induced cancer in these children in the future, according to a study published online first by JAMA Pediatrics .
The development of radiation-induced cancer risk is greater for children. The reason is that children are much more sensitive to radiation because of the way their cells divide.
Your DNA is much more susceptible to damage. While the risk of an adult develop a CT scan cancer is about 1 in 2000, for a child's risk rises to 1 in 500. To compound the problem, which is not always easy to know when levels of a CT scan are in the danger zone.
The results of the Institute of Medicine (IOM) found that computed tomography (CT) scans are one of the main causes of breast that are supposed to detect cancer, and women should avoid "Just- in-case 'and screening routine, report the US government concluded .
"fabrics developing children are more sensitive to radiation and their longer life expected includes also allows more time for the occurrence of adverse effects, "says co-author, Reza Fazel, MD, M.Sc., a cardiologist at Emory School of Medicine.while doctors say that radiation is safe as long as it is maintained at a certain level, it can be argued that even the smallest particle of radiation causes damage to DNA. for radiation to be sure, all DNA damage must be repaired perfectly.
any unrepaired damage creates mutations perfectly, any of which has the potential to lead to new cancer-causing mutations. In fact, the lowest possible dose of radiation is not only dangerous, but so does much more damage than previously thought and is, mutagenic effect.
In June 2005, the National Academy of Sciences released a report indicating that even very low doses of radiation can cause cancer. In its report, the National Academy defines as being low dose as low as "almost zero".
While researchers indicated that the risk of cancer by any X given ray is very small, the report states:
"Risk continue in a linear fashion at lower doses without threshold and that the smallest dose has the potential to cause a small increase in risk to humans. "The National Academy of Sciences stated that there is no threshold below which radiation exposure can be regarded as harmless. This finding means that everyone who has had a medical X-ray is at some increased risk of developing leukemia or solid cancer.
Given how many X-ray people are exposed to in a lifetime, the risk of developing the cumulative effects of many X-ray and CT scan cancer is a serious concern.
John W. Gofman, MD, PhD, was Emeritus Professor of Molecular and Cell Biology, University of California, Berkeley and one of the world's most distinguished doctors and nuclear scientists. His research showed that no amount of radiation - no matter how small -. It is safe
data analysis Dr. Gofman conflicts with other reports of the view that believed that many more cancers are caused by medical radiation. In addition, it concluded that exposure to radiation from medical procedures is a "(probably the manager) very important cause" for cancer and ischemic heart disease in the United States.
"For many patients MRI is the best choice," said Isabella Montera radiologist.Unlike CT scans, which use X-rays, MRI uses powerful magnetic fields and radio frequency pulses to produce detailed images of organs, soft tissues, bones and other internal structures of the body. The differences between normal and abnormal tissue is often clearer in a magnetic resonance image of a TC. There is no radiation involved in MRI.
"It can be a noisy examination and typically has a period longer than the IT time," Monterasaid No matter how much doctors reduce the levels of radiation used in individual CT studies, however, it remains a problem. Many people still receive unnecessary CT scans and, with them, the radiation doses that are not necessary.
Bruce Hillman of the University of Virginia and other researchers worry that emergency physicians, particularly TC order too, make quick decisions in high-pressure situations. In a 2004 survey 91 percent of emergency physicians I do not think CT poses no risk of cancer.
Physicians and their patients can finally be getting the message. An analysis of 2012 Medicare data suggests that the rampant growth earlier in CT procedures has flattened and possibly waning.
By Dave Mihalovic preventing disease ; | References: Ratical ; Scientific American ; JAMA Network ; Medstak ; Life Extension ;
Mihalovic Dave is a naturopathic doctor who specializes in vaccine research, cancer prevention and a natural approach to treatment.
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