Is there a hand-held device measures the percentage of radiation in the human body?
Because radiation is not a simple thing. There are 4 types of radiation, each with their own properties. The energy of each can drastically change depending on the circumstances that they cause their production. The types and energy of each particular type of radiation will decide how it affects the body and other material. To put it simply, it is not a simple subject.I do not have sufficient knowledge I heard about ( dosimeter ), this device WBC looks large, does not measure all the radiation, I thought that the topic was simpler than that.
Why there is no tables for the minimum and the maximum of what the body can bear and thus the person measuring the body
Here is a simple example. Suppose the measured background counting rate inside the vault in a certain pulse height range is 1 count per second, or 1000 counts in 16.7 minutes. Suppose the patient is put in the vault, and the total counts is 1050 for the same period, so the difference is 50 counts. But the standard deviation on each of these measurements is ±32 and ±33 counts respectively, for a combined statistical error of ±47 counts. Was there any activation (of the order of 5% of background inside the vault) in the patient?
The main reason is to reduce background rates so that you can exceed what is called the Minimum Detectable Activity, which is the minimum activity the counting system can discriminate from background radiation. It is a function of detector efficiency, counting time, and background rate.