Which method is NOT effective in reducing scatter radiation?

Increasing kilovolt peak (kVp) is not an effective method for reducing scatter radiation. In fact, raising the kVp results in higher energy photons being produced, which can penetrate tissues more effectively and, subsequently, generate more scatter radiation. Higher-energy photons tend to scatter more because they can interact with the tissues in a way that allows them to deviate from their original path without being absorbed.

On the other hand, reducing field size, employing the air gap technique, and using grids are all strategies that can help minimize scatter. Reducing the field size limits the exposure area, thus decreasing the amount of scatter generated. The air gap technique utilizes distance between the primary beam and the image receptor to reduce scatter. Utilizing grids helps improve imaging clarity by absorbing some of the scattered radiation before it reaches the detector, allowing for better image quality. Each of these methods serves to reduce not just the amount of scatter radiation, but also its impact on the diagnostic quality of the image.