Patent ID: 8088058

Claim:
A device for positioning a treatment instrument with respect to a patient, comprising: a holder for securing the treatment instrument, wherein the holder allows the treatment instrument to move about the patient; a first arm; a counterbalance; a vertical support coupled to the first arm at a pivot point, wherein the first arm is substantially transverse to the vertical support; wherein a first portion of the first arm extends in a first direction from the pivot point and a second portion of the first arm extends in a second direction from the pivot point, wherein the holder is coupled to the first portion of the first arm and the counterbalance is coupled to the second portion of the first arm; a second arm coupled to the vertical support and the holder such that the second arm is substantially parallel to the first portion of the first arm; and a vertical member directly coupled to the first arm and the second arm, wherein the vertical member is maintained in a substantially vertical orientation throughout the range of movement of the first arm.