Phantom evaluation of a navigation system for out-of-plane CT-guided puncture

• Published in: Diagnostic and interventional imaging Vol. 96; no. 6; pp. 531 - 536
• Main Authors: Moncharmont, L, Moreau-Gaudry, A, Medici, M, Bricault, I
• Format: Journal Article
• Language: English
• Published: France Elsevier Masson SAS 01-06-2015
• Subjects: Biopsy, Needle - methods; Computed tomography; Electromagnetic navigation; Electromagnetic Phenomena; Interventional radiology; Phantom study; Phantoms, Imaging; Prospective Studies; Punctures - methods; Radiology; Tomography, X-Ray Computed - methods; Electromagnetic navigation; Phantom study; Computed tomography; Interventional radiology
• ISSN: 2211-5684; 2211-5684
• DOI: 10.1016/j.diii.2015.03.002

Abstract Objective The purpose of this phantom study was to assess a new real time electromagnetically-guided navigation system and compare it to standard computed tomography (CT) guidance. Material and methods A prospective, randomized, comparative study was carried out over a two-day period. Operators without prior experience on the new navigation system sequentially attempted to puncture two 6 mm-diameter targets (one attempt for each target) with out-of-plane trajectories using both the standard CT-guided method and the new navigation station (NAV method). Results Intention-to-treat analysis was performed for 54 operators. Twenty-two operators out of 54 (40.7%) reached the target on first attempt with the NAV method versus none (0%) using CT-guidance ( P < 0.001). The median distance of the puncture from the center of the target was 3.7 mm [Q1–Q3 = 2–6.7] using NAV versus 15 mm [10–20] using CT-guidance ( P < 0.001). Overall planning and puncture time were shorter using NAV: 76 s [50–118] versus 214 s [181–264] using CT-guidance ( P < 0.001). Conclusion Novice operators consistently performed faster and more accurate phantom punctures with out-of-plane trajectories using the electromagnetically-guided navigation system than with the standard CT-guided method.