Tissue is imaged by a microscope capable of {HEAD ~ imaging sections} of {TAIL ~ the tissue} below the exposed tissue surface through optics 
of
Tissue is imaged by a microscope capable of { HEAD ~ imaging sections } of { TAIL ~ the tissue } below the exposed tissue surface through optics
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH