How is 24Na used to measure radiation in the human body?

Question

I’m working on an essay and I am way too dumb to understand this. So, as a long shot, anybody got an explanation on hand for me, a 5-year old?

In: Chemistry

Answer 1

As per [this study](https://academic.oup.com/rpd/article/186/2-3/202/5614307?login=false):  

Specific rates/amounts of radiation exposure will create a specific amount of Sodium-24 in the plasma. Measuring the amount of Sodium-24 in the plasma will give you an idea as to level of radiation exposure experienced by a particular patient.