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Laser-scan-based navigation in cranio-maxillofacial surgery.

Rüdiger Marmulla¹, Stefan Hassfeld, Tim Lüth

¹Department of Cranio-Maxillofacial Surgery, University of Heidelberg, Heidelberg, Germany. ruediger@marmulla.com

Journal of Cranio-Maxillo-Facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery

|October 18, 2003

Summary

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This study introduces a novel markerless registration method for computer-assisted cranio-maxillofacial surgery. Utilizing a high-resolution laser scan of the facial skin surface, it offers a more efficient alternative to traditional registration markers.

Area of Science:

Medical technology
Surgical navigation
Biomedical engineering

Background:

Computer-assisted surgery requires accurate patient localization.
Traditional marker registration is logistically intensive.
A new markerless method using laser scanning is proposed.

Purpose of the Study:

To evaluate a novel markerless registration technique for cranio-maxillofacial surgery.
To assess the feasibility of using the facial skin surface as a reference.

Main Methods:

A high-resolution laser scan of the patient's relaxed skin surface was employed.
The study involved 20 patients undergoing computer-assisted surgery.
Clinical accuracy was measured against traditional registration markers; phantom studies assessed system precision.

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Main Results:

The laser-scan-based registration achieved a clinical accuracy between 0.2 and 1.8 mm.
The mean deviation was 1.1 mm, with a standard deviation of 0.3 mm.

Conclusions:

The facial skin surface provides a stable and invariable reference for patient registration.
This markerless laser-scan method is suitable for computer-assisted cranio-maxillofacial surgery.