I am acquiring X-ray spectral images at resolution 512. Why do some frames take as little as 15 seconds to complete while others can take up to 30 seconds?

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I am acquiring X-ray spectral images at resolution 512. Why do some frames take as little as 15 seconds to complete while others can take up to 30 seconds?

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X-ray spectral imaging is dead time corrected. This means that every pixel gets equal live dwell time. This ensures that each pixel’s intensity is truly proportional to its corresponding X-ray intensity. Therefore, the real time required to acquire one frame depends on the percentage of dead time.

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