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An incremental registration method for endoscopic sinus and skull base surgery navigation: From phantom study to
Wenjie Li1, Jingfan Fan1, Shaowen Li1
1Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing, China.
Medical Physics
|August 23, 2022
Summary
A novel registration method improves surgical navigation accuracy and convenience. This surface-based approach offers a robust alternative to traditional scanners for better endoscopic sinus and skull base surgeries.
Area of Science:
- Medical Imaging
- Surgical Navigation
- Computational Geometry
Background:
- Current surface-based image-to-patient registration relies on 3D scanners with limitations like uncontrollable range and high failure rates.
- Accurate, robust, and user-friendly registration methods are crucial for advancing surgical navigation.
Purpose of the Study:
- To develop and evaluate an incremental point cloud registration method for surface-based image-to-patient registration.
- To address the limitations of existing scanner-based and fiducial-based registration techniques.
Main Methods:
- An incremental point cloud registration method using CT-extracted image space point clouds and optically tracked patient space point clouds.
- Template matching for point cloud refinement and nearest point distance (NPD) constraint for uniformity.
- Coarse-to-fine registration with coverage ratio (CR) and outliers ratio (OR) constraints for optimal rigid transformation.
Main Results:
- Phantom studies showed improved accuracy and robustness with proposed constraints.
- Comparative experiments demonstrated superior performance over scanner-based methods and comparable accuracy to fiducial-based methods.
- Clinical trials: average registration time 1.24 ± 0.43 min, Target Registration Error (TRE) 1.25 ± 0.40 mm, success rate 97.56% (exceeding 95% requirement).
Conclusions:
- The proposed method offers high accuracy and convenience, surpassing limitations of scanner-based and fiducial-based methods.
- This technique enhances the quality and reliability of endoscopic sinus and skull base surgeries.
- The method meets stringent clinical requirements for accuracy and efficiency.
