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Bronchoscope tracking without fiducial markers using ultra-tiny electromagnetic tracking system and its evaluation in
Kensaku Mori1, Daisuke Deguchi, Kazuyoshi Ishitani
1Graduate School of Information Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan. kensaku@is.nagoya-u.ac.jp
Medical Image Computing and Computer-Assisted Intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention
|November 30, 2007
Summary
This study introduces a novel bronchoscope tracking method using an ultra-tiny electromagnetic tracker (UEMT) without fiducial markers. The system achieves accurate bronchoscope localization for improved bronchoscopy guidance.
Area of Science:
- Medical Imaging
- Robotics
- Biomedical Engineering
Background:
- Bronchoscope tracking is crucial for minimally invasive procedures.
- Current methods often rely on fiducial markers, which can be invasive or impractical.
- Accurate real-time localization enhances navigation and safety during bronchoscopy.
Purpose of the Study:
- To develop and evaluate a fiducial-free bronchoscope tracking method.
- To improve the accuracy and reliability of bronchoscope positioning in a guidance system.
- To assess the performance of an ultra-tiny electromagnetic tracker (UEMT) for this application.
Main Methods:
- A novel registration technique using segmented bronchial branches from CT images and UEMT measurements.
- Dynamic computation of the transformation matrix between CT and UEMT coordinate systems.
- Attachment of the UEMT to the bronchoscope tip for real-time tracking.
Main Results:
- The proposed method demonstrated effective bronchoscope tracking without fiducial markers.
- Achieved a Target Registration Error (TRE) of approximately 3.3mm in a wood table environment.
- Achieved a TRE of approximately 4.0mm in an examination table environment.
Conclusions:
- The fiducial-free tracking method using UEMT shows promise for bronchoscopy guidance systems.
- The system offers a viable alternative to marker-based tracking, potentially improving usability.
- Further validation in clinical settings is warranted to confirm efficacy.
