An actuator is connected to both the ring and the microscope for moving the ring to adjust the position of the tissue with {TAIL ~ respect} to the optics, thereby allowing an operator of {HEAD ~ the system} to survey different images of tissue sections with the microscope 
An actuator is connected to both the ring and the microscope for moving the ring to adjust the position of the tissue with { TAIL ~ respect } to the optics , thereby allowing an operator of { HEAD ~ the system } to survey different images of tissue sections with the microscope
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