How is MAD calculated?

MAD, or Maximum Accumulated Dose, is calculated based on the age of the individual, with specific consideration given to the age threshold of 18 years. The formula for determining MAD reflects the understanding that individuals accumulate a certain level of radiation exposure over their lifetime, which is often measured as a function of their age beyond this threshold.

By using the formula that takes the age of the person, subtracting the baseline age of 18, and then multiplying the result by 5.0 REM/year, we are effectively establishing a safe cumulative limit for radiation exposure for adults. This approach is crucial because it acknowledges that individuals below this age may be less likely to have accumulated significant radiation exposure, hence their dose should be managed differently.

The multiplication by 5.0 REM/year is important as it represents the maximum allowed yearly dose to maintain safety in relation to radiation exposure guidelines. Therefore, it is understood that the cumulative possible dose increases with age, starting from when the individual is 18 years old, hence this formula is essential for determining safe levels of exposure in a dental setting or any medical context where radiation is used.