A laser beam is focussed on to a capillary by means of a lens, mirror and beam splitter system and {HEAD ~ measurement} of {TAIL ~ the velocity} of the blood cells in a direction substantially perpendicular to the surface of the tissue is effected by detecting directly back scattered radiation 
of
A laser beam is focussed on to a capillary by means of a lens , mirror and beam splitter system and { HEAD ~ measurement } of { TAIL ~ the velocity } of the blood cells in a direction substantially perpendicular to the surface of the tissue is effected by detecting directly back scattered radiation
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 REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH