Which change is associated with a decrease in the receptor exposure during radiographic imaging?

A decrease in receptor exposure in radiographic imaging can occur when the milliamperage (mA) is decreased. The mA setting determines the quantity of x-ray photons produced during a given exposure time. A lower mA means fewer photons are generated, resulting in reduced receptor exposure.

Increasing the exposure time would allow more photons to reach the receptor, thereby increasing exposure. Similarly, increasing kilovoltage (kVp) elevates the energy of the x-rays, which typically improves penetration and enhances receptor exposure. Moving the grid can affect the amount of scatter radiation reaching the receptor but does not directly correlate to a decrease in receptor exposure without additional context, as grids are used to improve image quality by reducing unwanted scatter. Thus, decreasing the mA is the correct answer, as it directly reduces the quantity of x-ray photons and consequently, the receptor exposure.