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A whole-body registration-free navigation system for image-guided surgery and interventional radiology
1Department of Radiology, University Hospital, Basel, Switzerland. AL@Jacob.ac
Rationale And Objectives:
To develop and test an image-guided navigation system in which the base of reference is taken from the imaging modality, here, a helical CT scanner.
Methods:
An optical digitizer together with a calibration device is used to measure the transformation matrix between the digitizer reference system and a CT reference system. During intervention, it tracks radiological and surgical tools with tool references. A specific software visually integrates the current tool position with the corresponding image information. In vitro accuracy tests were performed.
Results:
With helical CT, freehand positioning accuracy was 1.9 +/- 1.1 mm (mean +/- SD) in vitro (n = 718).
Conclusions:
The navigation system developed by the authors appears to be feasible for radiological interventions as well as for minimally invasive surgery. It is not limited to a certain procedure, can be used in every region of the body, and is functional after imaging. Intraprocedural scans can be integrated immediately.