System for robotically assisted percutaneous procedures with computed tomography guidance

Ken Masamune, Gabor Fichtinger, Alexandru Patriciu, Robert C. Susil, Russell H. Taylor, Louis R. Kavoussi, James H. Anderson, Ichiro Sakuma, Takeyoshi Dohi, Dan Stoianovici

Research output: Contribution to journalArticlepeer-review

87 Scopus citations


We present the prototype of an image-guided robotic system for accurate and consistent placement of percutaneous needles in soft-tissue targets under CT guidance inside the gantry of a CT scanner. The couch-mounted system consists of a seven-degrees-of-freedom passive mounting arm, a remote center-of-motion robot, and a motorized needle-insertion device. Single-image-based coregistration of the robot and image space is achieved by stereotactic localization using a miniature version of the BRW head frame built into the radiolucent needle driver. The surgeon plans and controls the intervention in the scanner room on a desktop computer that receives DICOM images from the scanner. The system does not need calibration, employs pure image-based registration, and does not utilize any vendor-specific hardware or software features. In the open air, where there is no needle-tissue interaction, we systematically achieved an accuracy better than 1 mm in hitting targets at 5-8 cm from the fulcrum point. In the phantom, the orientation accuracy was 0.6°, and the distance between the needle tip and the target was 1.04 mm. Experiments indicated that this robotic system is suitable for a variety of percutaneous clinical applications.

Original languageEnglish (US)
Pages (from-to)370-383
Number of pages14
JournalComputer Aided Surgery
Issue number6
StatePublished - Jan 1 2001


  • CT guidance
  • Image-guided surgery
  • Percutaneous needle placement
  • Surgical robotics

ASJC Scopus subject areas

  • Surgery
  • Radiology Nuclear Medicine and imaging


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