Which combination of exposure factors will result in the greatest receptor exposure?

The combination of exposure factors that results in the greatest receptor exposure is one that balances milliamperage (mA), exposure time (ms), and source-to-image distance (SID).

In this instance, the key components contributing to receptor exposure are the mA and exposure time, since they directly affect the quantity of x-rays generated. Higher mA values allow for a greater number of x-ray photons to be produced per unit of time, while longer exposure times allow the receptor to accumulate more of these photons.

Choice C has a mA of 200 and an exposure time of 60 ms. This translates to a total exposure of 12,000 mAs (200 mA × 60 ms), which is reasonably high. The 36-in. SID is a standard distance that minimizes the effect of geometric unsharpness and does not significantly reduce exposure compared to longer distances.

The other combinations have lower overall mAs and/or higher SIDs, which would lead to decreased receptor exposure. For example:

• A combination with 400 mA and a shorter exposure time would indeed produce a high output, but also consider the impact of longer SID in the other options which would result in lower receptor exposure due to increased distance reducing the intensity of