Intervention Planning Using a Laser Navigation System for CT-Guided Interventions: A Phantom and Patient Study.
10.3348/kjr.2015.16.4.729
- Author:
Tatjana GRUBER-ROUH
1
;
Clara LEE
;
Jan BOLCK
;
Nagy N N NAGUIB
;
Boris SCHULZ
;
Katrin EICHLER
;
Rene ASCHENBACH
;
Julian L WICHMANN
;
Thomas J VOGL
;
Stephan ZANGOS
Author Information
1. Institute for Diagnostic and Interventional Radiology, J. W. Goethe University of Frankfurt, Frankfurt 60590, Germany. tgruberrouh@googlemail.com
- Publication Type:Original Article ; Evaluation Studies
- Keywords:
Laser navigation system;
LNS;
CT-guided interventions;
Phantom study;
First experience with patients
- MeSH:
Adult;
Female;
Humans;
Image-Guided Biopsy/methods;
*Lasers;
Male;
Middle Aged;
Needles;
Phantoms, Imaging;
Punctures/*methods;
Tomography, X-Ray Computed/*instrumentation/*methods
- From:Korean Journal of Radiology
2015;16(4):729-735
- CountryRepublic of Korea
- Language:English
-
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 +/- 0.9degrees (freehand, 3.4 +/- 3.1degrees; 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 +/- 1.2degrees, 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 +/- 0.3degrees, 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.
