The relationship between kilovoltage peak (kVp) and image receptor exposure is described according to which of the following principles?

The correct choice, which is the 15% rule, reflects a fundamental principle in radiography regarding the relationship between kilovoltage peak (kVp) and image receptor exposure. This principle states that increasing the kVp by 15% will approximately double the exposure to the image receptor. Conversely, decreasing the kVp by 15% will roughly halve the exposure.

This understanding is crucial for radiologic technologists as it directly impacts image quality. Adjusting the kVp not only affects receptor exposure but also influences the contrast and sharpness of the images produced. By applying the 15% rule, technologists can make well-informed decisions on kVp adjustments to achieve optimal imaging based on patient characteristics and the required diagnostic information.

In contrast, other rules listed, such as the 25% rule, 10% rule, and 5% rule, do not accurately describe the most effective relationship between kVp changes and image receptor exposure, which is why they do not apply to this context. Understanding this specific relationship is crucial for maintaining proper image quality and ensuring adequate patient care.