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

Schubert, Tilman ; Jacob, Augustinus ; Pansini, Michele ; Liu, David ; Gutzeit, Andreas ; Kos, Sebastian

In: CardioVascular and Interventional Radiology, 2013, vol. 36, no. 4, p. 1055-1062

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    Titre
    • CT-Guided Interventions Using a Free-Hand, Optical Tracking System: Initial Clinical Experience
    Auteur
    • Schubert, Tilman. Department of Radiology and Nuclear Medicine, University Hospital Basel, 4031, Basel, Switzerland
    • Jacob, Augustinus. Department of Radiology and Nuclear Medicine, University Hospital Basel, 4031, Basel, Switzerland
    • Pansini, Michele. Department of Radiology and Nuclear Medicine, University Hospital Basel, 4031, Basel, Switzerland
    • Liu, David. Department of Radiology, Vancouver General Hospital, University of British Columbia, Vancouver, BC, Canada
    • Gutzeit, Andreas. Department of Radiology, Winterthur Cantonal Hospital, Winterthur, Switzerland
    • Kos, Sebastian. Department of Radiology and Nuclear Medicine, University Hospital Basel, 4031, Basel, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • CardioVascular and Interventional Radiology, 2013, vol. 36, no. 4, p. 1055-1062. Springer New York
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:318233
    Summary
    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 27.9ml, and mean distance to target measured was 107.5mm. 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 1.98mm. Mean intervention time was 1:12h. 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