Christian Erbelding1, Alfred Franz2, Alexander Seitel2, Nasrin Bopp2, Konstantin Kohlhase3, Frank Grünwald3, Lena Maier-Hein2. 1. Department of Nuclear Medicine, University Hospital Frankfurt/Main, Theodor-Stern-Kai 7, 60590, Frankfurt/Main, Germany. chr.erbelding@gmail.com. 2. Department of Computer Assisted Medical Interventions (CAMI), German Cancer Research Center (DKFZ), Im Neuenheimer Feld 581, 69120, Heidelberg, Germany. 3. Department of Nuclear Medicine, University Hospital Frankfurt/Main, Theodor-Stern-Kai 7, 60590, Frankfurt/Main, Germany.
Abstract
PURPOSE: A thyroid-like gelatin model was used to determine potential superiority of a new navigation system for ultrasound (US)-guided electrode insertion called EchoTrack, featuring a US probe with an integrated electromagnetic field generator, in comparison with conventional US when performing radiofrequency ablation. METHODS: In order to compare 20 navigated ablations with 20 ablations under conventional US guidance, a thyroid-like gelatin model was used. In each group, 10 in-plane and 10 out-of-plane punctures were performed. Metal seeds measuring 8.5 [Formula: see text] 1.8 mm served as ablation targets. The number of redirections until final electrode placement, targeting accuracy and electrode placement time were measured. RESULTS: The number of redirections could be significantly ([Formula: see text]) reduced from 2.7 ± 1.3 in the conventional group to 0.2 ± 0.5 in the EchoTrack group. Accuracy increased from 3.9 ± 4.7 to 2.0 ± 1.9 mm. The total placement time increased from 39 ± 20.5 to 79.2 ± 26 s. CONCLUSIONS: EchoTrack is able to reduce the redirections needed to place the electrode in comparison with conventional US and provides high placement accuracy. Our new navigation system has high potential to reduce the risk of harming critical structures and to improve guidance during ablation of difficult nodules, as treatment planning as well as the safety of out-of-plane punctures are improved.
PURPOSE: A thyroid-like gelatin model was used to determine potential superiority of a new navigation system for ultrasound (US)-guided electrode insertion called EchoTrack, featuring a US probe with an integrated electromagnetic field generator, in comparison with conventional US when performing radiofrequency ablation. METHODS: In order to compare 20 navigated ablations with 20 ablations under conventional US guidance, a thyroid-like gelatin model was used. In each group, 10 in-plane and 10 out-of-plane punctures were performed. Metal seeds measuring 8.5 [Formula: see text] 1.8 mm served as ablation targets. The number of redirections until final electrode placement, targeting accuracy and electrode placement time were measured. RESULTS: The number of redirections could be significantly ([Formula: see text]) reduced from 2.7 ± 1.3 in the conventional group to 0.2 ± 0.5 in the EchoTrack group. Accuracy increased from 3.9 ± 4.7 to 2.0 ± 1.9 mm. The total placement time increased from 39 ± 20.5 to 79.2 ± 26 s. CONCLUSIONS: EchoTrack is able to reduce the redirections needed to place the electrode in comparison with conventional US and provides high placement accuracy. Our new navigation system has high potential to reduce the risk of harming critical structures and to improve guidance during ablation of difficult nodules, as treatment planning as well as the safety of out-of-plane punctures are improved.
Authors: K März; A M Franz; A Seitel; A Winterstein; M Hafezi; A Saffari; R Bendl; B Stieltjes; H-P Meinzer; A Mehrabi; L Maier-Hein Journal: Int J Comput Assist Radiol Surg Date: 2014-03-25 Impact factor: 2.924
Authors: David Sindram; Ryan Z Swan; Kwan N Lau; Iain H McKillop; David A Iannitti; John B Martinie Journal: HPB (Oxford) Date: 2011-01-27 Impact factor: 3.647
Authors: Alfred Michael Franz; Alexander Seitel; Nasrin Bopp; Christian Erbelding; Dominique Cheray; Stefan Delorme; Frank Grünwald; Hüdayi Korkusuz; Lena Maier-Hein Journal: Int J Comput Assist Radiol Surg Date: 2017-03-22 Impact factor: 2.924