Above what kilovolt (kV) does the Compton effect become the predominant interaction?

Prepare for the ACRRT Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

The correct kilovolt threshold for the Compton effect to become the predominant interaction in diagnostic imaging is approximately 100 kV. At this energy level, Compton scattering begins to overshadow the photoelectric effect, which is more predominant at lower energies.

As the energy increases beyond this point, particularly around 100 kV and higher, Compton scattering becomes the primary interaction for x-rays with matter. The Compton effect involves the scattering of photons by electrons, which results in a change in direction and energy of the photons. This process is critical in radiographic imaging, as it contributes to image formation, especially in the context of soft tissue and bone densities.

In the context of the options provided, while choice B suggests 180 kV, it's important to recognize that the shift towards the Compton effect occurring at lower energy ranges (like 100 kV) means that this specific choice does not accurately represent the threshold energy. Higher energy levels, such as 250 kV and 300 kV, continue to see Compton scattering occurrences, but they don't establish a new threshold; they simply reinforce its prevalence over the photoelectric effect. Understanding that Compton scattering is predominant around 100 kV allows professionals in the field to optimize imaging

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