Which method is most effective in minimizing motion unsharpness during imaging?

Minimizing motion unsharpness during imaging is crucial for obtaining clear and precise images. The most effective method is to utilize suspended respiration. When patients are instructed to hold their breath during imaging, it significantly reduces any movement that may occur due to breathing. This stillness allows the imaging system to capture a clearer representation of the anatomical structures being examined, thereby enhancing the resolution and detail in the images.

Long exposure time, on the other hand, can actually lead to greater motion unsharpness. If the exposure time is too long, any slight motion—whether from breathing or any other involuntary movements—can cause blurriness in the resulting image. Using high mA might improve image quality through increased radiation dose and better signal-to-noise ratio, but it does not address issues related to motion. Increased patient movement inherently contributes to motion unsharpness, contradicting the goal of achieving clear imaging.

Thus, utilizing suspended respiration is the most effective strategy to ensure that patients remain as still as possible during the imaging process, directly addressing and minimizing motion unsharpness.