PURPOSE: To evaluate the accuracy of a 3-dimensional (3D) navigation system using electromagnetically tracked tools to explore its potential in patients. METHODS: The 3D navigation accuracy was quantified on a phantom and in a porcine model using the same setup and vascular interventional suite. A box-shaped phantom with 16 markers was scanned in 5 different positions using computed tomography (CT). The 3D navigation system registered each CT volume in the magnetic field. A tracked needle was pointed at the physical markers, and the spatial distances between the tracked needle positions and the markers were calculated. Contrast-enhanced CT images were acquired from 6 swine. The 3D navigation system registered each CT volume in the magnetic field. An electromagnetically tracked guidewire and catheter were visualized in the 3D image and navigated to 4 specified targets. At each target, the spatial distance between the tracked guidewire tip position and the actual position, verified by a CT control, was calculated. RESULTS: The mean accuracy on the phantom was 1.28±0.53 mm, and 90% of the measured distances were ≤1.90 mm. The mean accuracy in swine was 4.18±1.76 mm, and 90% of the measured distances were ≤5.73 mm. CONCLUSION: This 3D navigation system demonstrates good ex vivo accuracy and is sufficiently accurate in vivo to explore its potential for improved endovascular navigation.
PURPOSE: To evaluate the accuracy of a 3-dimensional (3D) navigation system using electromagnetically tracked tools to explore its potential in patients. METHODS: The 3D navigation accuracy was quantified on a phantom and in a porcine model using the same setup and vascular interventional suite. A box-shaped phantom with 16 markers was scanned in 5 different positions using computed tomography (CT). The 3D navigation system registered each CT volume in the magnetic field. A tracked needle was pointed at the physical markers, and the spatial distances between the tracked needle positions and the markers were calculated. Contrast-enhanced CT images were acquired from 6 swine. The 3D navigation system registered each CT volume in the magnetic field. An electromagnetically tracked guidewire and catheter were visualized in the 3D image and navigated to 4 specified targets. At each target, the spatial distance between the tracked guidewire tip position and the actual position, verified by a CT control, was calculated. RESULTS: The mean accuracy on the phantom was 1.28±0.53 mm, and 90% of the measured distances were ≤1.90 mm. The mean accuracy in swine was 4.18±1.76 mm, and 90% of the measured distances were ≤5.73 mm. CONCLUSION: This 3D navigation system demonstrates good ex vivo accuracy and is sufficiently accurate in vivo to explore its potential for improved endovascular navigation.
Authors: Pascale Tinguely; Marius Schwalbe; Torsten Fuss; Dominik P Guensch; Andreas Kohler; Iris Baumgartner; Stefan Weber; Daniel Candinas Journal: PLoS One Date: 2018-05-23 Impact factor: 3.240
Authors: Verónica García-Vázquez; Felix von Haxthausen; Sonja Jäckle; Christian Schumann; Ivo Kuhlemann; Juljan Bouchagiar; Anna-Catharina Höfer; Florian Matysiak; Gereon Hüttmann; Jan Peter Goltz; Markus Kleemann; Floris Ernst; Marco Horn Journal: Innov Surg Sci Date: 2018-10-04
Authors: Christian Askeland; Ole Vegard Solberg; Janne Beate Lervik Bakeng; Ingerid Reinertsen; Geir Arne Tangen; Erlend Fagertun Hofstad; Daniel Høyer Iversen; Cecilie Våpenstad; Tormod Selbekk; Thomas Langø; Toril A Nagelhus Hernes; Håkon Olav Leira; Geirmund Unsgård; Frank Lindseth Journal: Int J Comput Assist Radiol Surg Date: 2015-09-26 Impact factor: 2.924