Are attenuator and decimation changes corrected for in images?
Yes. The effect of different attenuator states and decimation states are corrected for when making an image. You shouldn’t make an image that spans an attenuator state change though – be sure to stop (or start) the image a few seconds before (or after) the attenuator state change. Because the decimation correction is made on the same time scale as the time bins used in imaging, and the decimation correction is exact, you can span a change in decimation state when making an image. The only caveat is that your energy band should not span the energy at which the decimation level changes. However, this doesn’t mean that the image flux will be consistent across these boundaries, because there may be other effects that are not corrected. For example, in lower attenuator states, pileup may be an issue, but we don’t correct for pileup. Also, if you use wide energy bands below ~20 keV, the attenuator state correction will be inaccurate because a single number is being used to approximate the at
