Intervention Planning Using a Laser Navigation System for CT-Guided Interventions: A Phantom and Patient Study

Overview

Journal Korean J Radiol

Specialty Radiology

Date 2015 Jul 16

PMID 26175571

Citations 5

Authors

Tatjana Gruber-Rouh

Clara Lee

Jan Bolck

Nagy N N Naguib

Boris Schulz

Katrin Eichler

Rene Aschenbach

Julian L Wichmann

Thomas J Vogl

Stephan Zangos

Affiliations

Soon will be listed here.

Abstract

Objective: To investigate the accuracy, efficiency and radiation dose of a novel laser navigation system (LNS) compared to those of free-handed punctures on computed tomography (CT).

Materials And Methods: Sixty punctures were performed using a phantom body to compare accuracy, timely effort, and radiation dose of the conventional free-handed procedure to those of the LNS-guided method. An additional 20 LNS-guided interventions were performed on another phantom to confirm accuracy. Ten patients subsequently underwent LNS-guided punctures.

Results: The phantom 1-LNS group showed a target point accuracy of 4.0 ± 2.7 mm (freehand, 6.3 ± 3.6 mm; p = 0.008), entrance point accuracy of 0.8 ± 0.6 mm (freehand, 6.1 ± 4.7 mm), needle angulation accuracy of 1.3 ± 0.9° (freehand, 3.4 ± 3.1°; p < 0.001), intervention time of 7.03 ± 5.18 minutes (freehand, 8.38 ± 4.09 minutes; p = 0.006), and 4.2 ± 3.6 CT images (freehand, 7.9 ± 5.1; p < 0.001). These results show significant improvement in 60 punctures compared to freehand. The phantom 2-LNS group showed a target point accuracy of 3.6 ± 2.5 mm, entrance point accuracy of 1.4 ± 2.0 mm, needle angulation accuracy of 1.0 ± 1.2°, intervention time of 1.44 ± 0.22 minutes, and 3.4 ± 1.7 CT images. The LNS group achieved target point accuracy of 5.0 ± 1.2 mm, entrance point accuracy of 2.0 ± 1.5 mm, needle angulation accuracy of 1.5 ± 0.3°, intervention time of 12.08 ± 3.07 minutes, and used 5.7 ± 1.6 CT-images for the first experience with patients.

Conclusion: Laser navigation system improved accuracy, duration of intervention, and radiation dose of CT-guided interventions.

Citing Articles

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Computed tomography-guided biopsies in children: accuracy, efficiency and dose usage.

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