An apparatus and method for use in correcting for table sag within a dual imaging
system wherein the dual system includes two separate imaging configurations that
define first and second imaging areas arranged sequentially along an imaging axis
and that generate first and second imaging data sets, the apparatus including at
least one sensor for identifying table sag and a compensator for modifying at least
one data set to correct for table sag prior to combining the data sets to form
a single image.