What happens to receptor exposure when the mAs is doubled while keeping kVp constant?

When the mAs (milliampere-seconds) is doubled while keeping the kVp (kilovolt peak) constant, the receptor exposure increases directly in proportion to the mAs value. The mAs is a measure of the total amount of current flowing over a specific period, which directly relates to the quantity of X-rays produced. By doubling the mAs, you effectively double the number of X-rays reaching the receptor.

This increase in X-ray quantity results in a corresponding increase in the amount of exposure that the receptor (such as a film or digital detector) receives. Therefore, receptor exposure is directly influenced by changes in mAs, and when mAs is doubled, the receptor exposure indeed doubles.

In contrast, other options suggest different percentage changes or a constant exposure, which would not align with the principle that receptor exposure is directly proportional to mAs. Hence, the correct answer reflects the fundamental relationship between mAs and receptor exposure in X-ray imaging.