A clutched-gear handle (1650) for a fiducial (400) deployment system including an advancement mechanism comprising: a handle (1654), a stylet (1660) and an actuation mechanism (1670) said actuation mechanism (1670) including at least one rotatable gear (1664,1666) mechanically communicating between an actuation member, embodied as a lever, a knob, or a button, and at least one rack (1676) attached to the stylet (1660), where the mechanism is constructed such that actuating the actuation mechanism (1670) rotates the at least one unidirectionally rotatable gear and thereby communicates mechanical force through the at least one rack (1676) to the stylet (1660) in a manner that distally advances at least one of the plurality of fiducials (400) past the detent and distally out of the needle lumen.
