FIGURE 8.  z Filtering. (A) For MSCT scans configured to acquire thicker slices (e.g., 5 mm), slices are interpolated as for SSCT. (B) For MSCT scans with small detector collimation, numerous measurements are obtained within slice plane (up to 13, in this example) to form thicker slices. Combining many measurements to form thicker slices is referred to as z filtering.