Which statement describes the relationship between milliamperage (mA) and receptor exposure?

The statement that receptor exposure is directly proportional to the milliamperage (mA) is correct because increasing the mA during an x-ray exposure increases the number of x-ray photons produced. This increase in the quantity of photons translates directly into a higher amount of radiation reaching the imaging receptor, which results in greater receptor exposure.

In radiography, mA is a measure of the tube current, and by increasing it, you allow more electrons to flow across the x-ray tube, effectively leading to a higher output of radiation. This increase in exposure ultimately enhances the density of the radiograph, making it darker, assuming all other factors remain constant.

The nature of this direct proportionality implies that if the mA is doubled, the receptor exposure would also double, facilitating a significant understanding for radiographers in achieving optimal image quality while preventing underexposure or overexposure of the receptor.