- In connection with x-ray and CT scan used x-rays
- X-rays can be harmful to fetuses depending on the radiation dose, and how far the woman is at in pregnancy
- It is necessary to carry out a study, which uses x-rays, so given that virtually never doses, which inflicts damage to the fetus
X Rays are discovered by Rontgen accidentally. There are no completed studies on embryos, but we’ve measured radiation absorption in the uterus. Assuming that the radiation dose to the fetus is the same, as the uterus are exposed.
Specifies the average absorbed dose in a tissue or organ weighted for the type and quality of the radiation. Equivalent dose is measured in the unit sievert (Sv).
There is broad consensus that the border between dangerous and non-dangerous radiation dose is located at 100 mSv. As an example, a traditional x-ray of the lungs with a pregnant woman leads to a radiation dose 0.01 mSv, i.e. < less than a ten-thousandth of the dangerous dose. Visit internetdict official site for Types of X Rays.
Types of radiation damage
The fetus is sensitive to rays through the whole pregnancy, but the risk of injury depends on when in the pregnancy exposure occurs, and what dose (number of mGy) fetus is exposed to.
The fetus is most sensitive in the 1. trimester (before week 12) and less sensitive in 2. and (3). trimester (after week 12). The risk of malformations is greatest in week 3-11, which is the period during which the organs are formed. Risk of brain damage is greatest in the period from week 8-25, which is the period in which the nervous system grows and develops the most.
Both when it comes to the risk of malformations and brain damage, there is broad consensus that there is a so-called threshold dosage before damage occurs. In other words, if the radiation dose is below the threshold dose, there is no risk. If the radiation dose is above the threshold dose may cause damage, and the risk of injury is increased, the more of threshold level dose is.
Radiation in very large doses can also lead to direct fetal death. Threshold dose for this is far above it, which is used by traditional x-ray studies.
We also believe that cancer development in children may be triggered by radiation. When it comes to cancer, there’s probably no clear threshold dose. Studies have shown a slight increase in cancer incidence with increased radiation doses. There is nothing to suggest that there is a greater risk from irradiation of fetuses than there is by taking the radiograph of the children. There is not seen any increased risk for cancer development up to age 19 in children who are irradiated with 1 mSv in relation to children who have not been exposed to x-ray studies. 1 mSv corresponds to 100 times the dose to the foetus is exposed to when the mother will have taken an x-ray of the lungs.