If the largest distance from a focus point to the best fit surface is larger than the predetermined value, then {HEAD ~ the virtual slide image} is designated as needing a manual inspection and {TAIL ~ possible re scan} 
is designated as needing
If the largest distance from a focus point to the best fit surface is larger than the predetermined value , then { HEAD ~ the virtual slide image } is designated as needing a manual inspection and { TAIL ~ possible re scan }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL