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Related Experiment Video

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Electromagnetic Navigation Transthoracic Nodule Localization for Minimally Invasive Thoracic Surgery
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Towards markerless navigation for percutaneous needle insertions.

Alexander Seitel1,2, Nadine Bellemann3, Mohammadreza Hafezi4

  • 1Junior Group: Computer-Assisted Interventions, German Cancer Research Center (DKFZ), Heidelberg, Germany. aseitel@ece.ubc.ca.

International Journal of Computer Assisted Radiology and Surgery
|May 29, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a novel markerless navigation system for computed tomography (CT)-guided percutaneous needle insertions. The system uses range imaging for real-time guidance, aiming to improve accuracy and workflow efficiency in abdominal lesion procedures.

Keywords:
Computer-assisted interventionNeedle insertionRange imagingSurface registrationTime of flight

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Area of Science:

  • Medical Imaging
  • Image-Guided Therapy
  • Surgical Navigation

Background:

  • Percutaneous needle insertions are crucial for abdominal lesion diagnosis and treatment.
  • CT-guided punctures face challenges in transferring planned trajectories to patients, often requiring repositioning and additional scans.
  • Existing navigation systems are not widely adopted due to cost and complexity.

Purpose of the Study:

  • To present the first markerless and trackerless navigation concept for real-time patient localization and instrument guidance.
  • To develop a system that integrates smoothly into clinical workflows without requiring markers or external tracking.
  • To utilize range imaging for contactless and radiation-free patient localization and instrument guidance.

Main Methods:

  • A novel navigation concept employing a range imaging device for contactless data acquisition.
  • Real-time patient localization and instrument guidance without markers or external tracking systems.
  • Integration into clinical workflow designed for ease of use.

Main Results:

  • Feasibility demonstrated in phantom and porcine models.
  • Median targeting accuracy of 6.9 mm in phantom studies.
  • Median targeting accuracy of 19.4 mm in porcine models.

Conclusions:

  • The markerless navigation approach shows promise as an alternative for guiding percutaneous needle insertions.
  • Further improvements in system performance, camera technology, and motion compensation are needed for clinical application.
  • Automation and consideration of respiratory motion are expected to enhance the system's utility.