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Rotational encoding of C-arm fluoroscope with tilt sensing accelerometer
Victor Grzeda1, Gabor Fichtinger
1Queen's University, Kingston, ON, Canada v.grzeda@queensu.ca
Medical Image Computing and Computer-Assisted Intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention
|October 1, 2010
Summary
Retrofitting legacy C-arm fluoroscopes with accelerometers offers an affordable solution for accurate joint encoding. This method precisely tracks C-arm rotations, overcoming limitations of traditional systems.
Area of Science:
- Medical Imaging Technology
- Surgical Navigation Systems
Background:
- Accurate joint encoding for legacy C-arm fluoroscopes presents a significant technical challenge.
- Conventional pose tracking methods (optical cameras, radiographic fiducials) have notable limitations.
Purpose of the Study:
- To develop an accurate, practical, and affordable method for joint encoding on legacy C-arm fluoroscopes.
- To overcome the shortcomings of existing pose tracking technologies.
Main Methods:
- Retrofitting legacy C-arms with tilt-sensing accelerometers for rotation encoding.
- Utilizing a webcam for ground-truth C-arm pose tracking via a checkerboard plate.
- Developing angle and structural correction equations to relate accelerometer readings to C-arm pose and compensate for deformations.
Main Results:
- Real-time tracking of primary and secondary C-arm angle rotations achieved.
- Accuracy and precision of less than 0.5 degrees demonstrated across the entire range of interest.
Conclusions:
- The proposed accelerometer-based system provides a feasible and accurate solution for C-arm joint encoding.
- This approach offers a cost-effective alternative for enhancing surgical navigation with legacy C-arm systems.
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