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CT-Guided Interventions Using a Free-Hand, Optical Tracking System: Initial Clinical Experience

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Abstract

Purpose

The present study was designed to evaluate the geometrical accuracy and clinical applicability of a new, free-hand, CT-guided, optical navigation system.

Methods

Fifteen procedures in 14 consecutive patients were retrospectively analyzed. The navigation system was applied for interventional procedures on small target lesions, in cases with long needle paths, narrow access windows, or when an out-of-plane access was expected. Mean lesion volume was 27.9 ml, and mean distance to target measured was 107.5 mm. Eleven of 15 needle trajectories were planned as out-of-plane approaches regarding the axial CT plane.

Results

Ninety-one percent of the biopsies were diagnostic. All therapeutic interventions were technically successful. Targeting precision was high with a mean distance of the needle tip from planned target of 1.98 mm. Mean intervention time was 1:12 h. A statistically significant correlation between angular needle deviation and intervention time (p = 0.007), respiratory movement of the target (p = 0.008), and body mass index (p = 0.02) was detected. None of the evaluated parameters correlated significantly with the distance from the needle tip to the planned target.

Conclusions

The application of a navigation system for complex CT-guided procedures provided safe and effective targeting within a reasonable intervention time in our series.

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Conflict of interest

Tilman Schubert, Augustinus L. Jacob, Michele Pansini, David Liu, Andreas Gutzeit, and Sebastian Kos declare that they have no conflict of interest.

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Authors and Affiliations

  1. Department of Radiology and Nuclear Medicine, University Hospital Basel, 4031, Basel, Switzerland

    Tilman Schubert, Augustinus L. Jacob, Michele Pansini & Sebastian Kos

  2. Department of Radiology, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada

    David Liu

  3. Department of Radiology, Winterthur Cantonal Hospital, Winterthur, Switzerland

    Andreas Gutzeit

Authors
  1. Tilman Schubert
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  2. Augustinus L. Jacob
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  3. Michele Pansini
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  4. David Liu
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  5. Andreas Gutzeit
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  6. Sebastian Kos
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Corresponding author

Correspondence to Tilman Schubert.

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Schubert, T., Jacob, A.L., Pansini, M. et al. CT-Guided Interventions Using a Free-Hand, Optical Tracking System: Initial Clinical Experience. Cardiovasc Intervent Radiol 36, 1055–1062 (2013). https://doi.org/10.1007/s00270-012-0527-5

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  • DOI: https://doi.org/10.1007/s00270-012-0527-5

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