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An accelerometer-based guidance device for CT-guided procedures: an improved wireless prototype.

Federico Pedersoli1, Christoph Wilkmann1,2, Tobias Penzkofer3,4

  • 1Department of Diagnostic and Interventional Radiology, RWTH Aachen University Hospital, Aachen, Germany.

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PubMed
Summary
This summary is machine-generated.

A new accelerometer-based guidance system for CT-guided punctures is feasible. This device-assisted method significantly improves accuracy and reduces control scans compared to free-hand techniques.

Keywords:
Puncturesimage-guided biopsymultidetector computed tomography

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Area of Science:

  • Medical Imaging
  • Interventional Radiology
  • Surgical Navigation

Background:

  • Percutaneous CT-guided punctures are common procedures.
  • Free-hand techniques can be limited by accuracy and procedural steps.
  • Novel guidance systems are needed to improve efficiency and precision.

Purpose of the Study:

  • To demonstrate the feasibility of a prototype accelerometer-based guidance system for percutaneous CT-guided punctures.
  • To compare the accuracy and efficiency of this device-assisted method against traditional free-hand punctures.

Main Methods:

  • A prototype accelerometer-based guidance system was developed, featuring CT coordinate system alignment and wireless connectivity.
  • Feasibility was tested in a swine cadaver model using out-of-plane device-assisted punctures (one-step).
  • Device-assisted punctures were compared to free-hand punctures regarding deviation to target, angle accuracy, control scans, and procedure time.

Main Results:

  • One-step device-assisted punctures showed minimal deviation: 0.26±0.37 cm (axial) and 0.21±0.19 cm (sagittal).
  • Device-assisted punctures demonstrated significantly higher accuracy (0.20±0.17 cm vs. 0.30±0.21 cm) compared to free-hand.
  • The device-assisted approach required fewer control scans (1.3±1.1 vs. 3.7±0.9).

Conclusions:

  • The accelerometer-based guidance system is feasible for percutaneous CT-guided punctures.
  • Device-assisted punctures offer significantly improved accuracy over free-hand methods.
  • This technology reduces the number of necessary control scans, enhancing procedural efficiency.