What is a mSv in REM?
One microrem is equal to 0.000001 rem.
One Sv is equal to 100 rem.
Radiation is measured using the unit sievert, which quantifies the amount of radiation absorbed by human tissues. One sievert is 1,000 millisieverts (mSv).
Frequently used SI multiples are the millisievert (1 mSv = 0.001 Sv) and microsievert (1 μSv = 0.000001 Sv).
A CT examination with an effective dose of 10 millisieverts (abbreviated mSv; 1 mSv = 1 mGy in the case of x-rays.) may be associated with an increase in the possibility of fatal cancer of approximately 1 chance in 2000.
One sievert equals 100 rem.
The unit equivalences between the systems are 1 Sv = 100 rem, or 1 rem = 10 mSv. Thus, 1 mSv = 100 mrem. The whole-body exposure threshold for acute hematopoietic syndrome or “radiation sickness” is 500 mGy.
mSv↔rem 1 rem = 10 mSv.
A sievert is a very large unit of dose and often millisieverts (mSv) or microsieverts (μSv) are used. An older unit of radiation dose, which is still often used in the United States is the roentgen equivalent in man (rem). One Sv is equal to 100 rem.