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An ultrasound-driven needle-insertion robot for percutaneous cholecystostomy
1Department of Mechano-Informatics, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan.
Physics in Medicine and Biology
|March 12, 2004
Summary
A novel robot uses real-time ultrasound guidance and image segmentation for accurate needle insertion during percutaneous cholecystostomy. This medical robot addresses challenges posed by patient motion, improving intervention precision.
Area of Science:
- Medical robotics
- Interventional radiology
- Medical imaging
Background:
- Image-guided interventions offer minimally invasive procedures.
- Involuntary patient motion can compromise the accuracy of interventions.
- Percutaneous cholecystostomy requires precise needle placement.
Purpose of the Study:
- To develop a real-time ultrasound-guided robotic system for percutaneous cholecystostomy.
- To compensate for organ displacement caused by patient motion during interventions.
- To enhance the accuracy and safety of image-guided procedures.
Main Methods:
- Development of a medical robot for real-time ultrasound-guided needle insertion.
- Implementation of a novel ultrasonic image segmentation technique for intraoperative image analysis.
- Real-time modification of the needle path based on segmented images.
Main Results:
- Successful accurate needle placement in the target during animal experiments.
- Demonstrated feasibility in phantom and volunteer studies with rapid needle path updating times (130 ms and 301 ms per cycle, respectively).
- The system effectively addresses organ displacement challenges.
Conclusions:
- The developed robotic system enables accurate and real-time ultrasound-guided needle insertion.
- This technology has the potential to improve the precision of percutaneous cholecystostomy and other image-guided interventions.
- The novel image segmentation technique is crucial for adapting to patient motion during procedures.