2009
DOI: 10.1243/09544119jeim617
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The Pathfinder image-guided surgical robot

Abstract: This paper first describes the workflow of the Pathfinder image-guided surgical robot that has been designed to replace the stereotactic frame in neurosurgery, and then details the calibration stages employed in order to achieve submillimetre positioning accuracy of a tool tip. The process uses non-linear parameter identification techniques in conjunction with some procedures for camera calibration, which exploit the fact that the camera is mounted to a calibrated robot arm that executes precise motions.

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Cited by 39 publications
(18 citation statements)
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“…• the Gross Positioner, GP, (PathFinder, Prosurgics Ldt, UK); a serial 6 DoFs arm, which is used to approach the patient head [13]; • the Fine Positioner, FP, (MARS, Mazor, Israel); a parallel 6 DoFs PKM, used to further correct the targeting. It is rigidly connected to the GP via a quick release interlock; • the Linear Actuator, LA; 1-DoF piezo-actuator, which makes the biopsy linear probe advance through a teleoperated haptic interface (Omega, Force Dimension, Switzerland) [14].…”
Section: A the Robotic Systemmentioning
confidence: 99%
“…• the Gross Positioner, GP, (PathFinder, Prosurgics Ldt, UK); a serial 6 DoFs arm, which is used to approach the patient head [13]; • the Fine Positioner, FP, (MARS, Mazor, Israel); a parallel 6 DoFs PKM, used to further correct the targeting. It is rigidly connected to the GP via a quick release interlock; • the Linear Actuator, LA; 1-DoF piezo-actuator, which makes the biopsy linear probe advance through a teleoperated haptic interface (Omega, Force Dimension, Switzerland) [14].…”
Section: A the Robotic Systemmentioning
confidence: 99%
“…Ltd) are placed near to the CT bed and are controlled to move to the target point through the surgical planning. In addition, there are ROSA from Medtech in France [34], Renaissance from Mazor Robotics in the United States, Pathfinder from Pathfinder Technologies [35], NeuroMate robotics from Renishaw in UK [36], B-Rob from ISYS Medizintechnik GmbH [37], etc. These systems have already demonstrated certain clinical effects.…”
Section: Conclusion and Discussionmentioning
confidence: 99%
“…A 6 DoF robotic arm is installed on a mobile and stable platform, which can be easily moved around the operating room and firmly fixed to the Mayfied during surgery. One of Pathfinder trademarks lies in the fiducial markers (reflectors) attached to the patient's scalp or skull, and their continuous tracking using an embedded vision system to register the robot to the intraoperative space [42]. These markers consist of a black titanium sphere, coated in a reflective material, which is easily visible in CT scans and by the camera system [41], [43].…”
Section: State-of-the-art Robotic Systemsmentioning
confidence: 99%
“…Furthermore, the robot can be repositioned in the operating room without the need to rescan or replan [45]. External fiducial markers allow the robotic system to constantly track its position in relation to the patient, thus solving one of the greatest issues regarding preoperative image guided robots, and relieving the need for intraoperative online image scans [41], [42]. The most commonly reported problems with the Pathfinder system are: possible skin movements between preoperative and intraoperative scans, and registration failures caused by the misidentification of markers due to abnormal lighting conditions [41].…”
Section: State-of-the-art Robotic Systemsmentioning
confidence: 99%