In fact, the disconnection of radiation damage is also a hooligan.
For this, the industry has confirmed a lot of research: X -rays have a threshold for all mammals and cubs including humans, and even the adverse effects of embryos!value!of!
To put it simply, it is not to say that it hurts as soon as it is exposed to radiation.Regardless of whether it is an adult or a fetus, the radiation must reach a certain degree before it will be damaged.
Regarding this question, the answer is very certain.
The relevant guidelines released by the American Obstetrics and Gynecology Association (ACOG) in 2017 pointed out that the impact and risk of X -ray radiation on the fetus mainly depends on two factors: (1) fetal age (2) radio dose
That is, different fetal age will correspond to different ray safety doses.
So, what is this dose?What is the minimum dose?
This data is also clear: (1) 0-2 weeks of pregnancy, the threshold of the teratogenic dose is: 50-100 msv (Hamsifer), which mainly affects the death of the fetus;The threshold is: 200 msv (Hamshi), the main impact is congenital malformation; (3) 8-15 weeks of pregnancy, the threshold of the deformed dose is: 60-310 MSV (Hamshi), which mainly affects intelligence and malformations; (4) 16-25 weeks of pregnancy, the threshold of the teratogenic dose is: 250-280 msv (Hamshi), which mainly affects intelligence.
Therefore, you can see that the minimum influencing threshold of all tires is: 50msv (Hamshi)
In other words: As long as the ray dose exceeds 50msv (Hamshi), it will not be damaged.
Although in different cases, the value of the X -rays and CTs of different hospitals will change slightly, but this change is very small.Under normal circumstances: A radiation dose of an ordinary chest tablet: 0.02 m SV (Nissifer) A radiation dose of a knee X -ray: 0.005 msv (Nishisa) a radiation dose of an ordinary dental tablet: 0.01 msv (0.01 msv (Nissifer) A radiation dose of a head CT: 2 MSV (Nissif) A radiation dose of a chest CT: 8 msv (Nissis) ……
Obviously, the radiation doses of these inspections are much lower than the 50MSV (Missifer) mentioned earlier.
If you want to reach 50msv, that guy, you have to take 2500 breasts in a row, that is, the most radiated chest CT must also do it 6 times.Who would do it like this?
When shooting chest slices, many hospitals will bring the investigators with a special lead -cap and lead, and a heavy lead apron below the waist.Epolid organs such as perineal.
It should be pointed out that B -ultrasound and magnetic resonance are even more safe and have no effect on the fetus.
