{TAIL ~ Beam spot monitoring arrangement} for {HEAD ~ use} in a scanning electron beam computed tomography scanner and method 
{ TAIL ~ Beam spot monitoring arrangement } for { HEAD ~ use } in a scanning electron beam computed tomography scanner and method
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH