Comparison of freehand‐navigated and aiming device‐navigated targeting of liver lesions. Issue 1 (8th July 2013)

• Record Type: Journal Article
• Authors: Wallach, D.; Toporek, G.; Weber, S.; Bale, R.; Widmann, G.
• Is Part Of: International journal of medical robotics and computer assisted surgery. Volume 10:Issue 1(2014)
• Page Start: 35
• Page End: 43
• Publication Date: 2013-07-08
• Subjects: Robotics in medicine -- Periodicals; Surgery -- Technological innovations -- Periodicals; Imaging systems in medicine -- Periodicals; 617.90285
• DOI: 10.1002/rcs.1505
• Languages: English
• ISSNs: 1478-5951

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <sec id="rcs1505-sec-0001" sec-type="section"> <title>Background</title> <p>Accurate needle placement is crucial for the success of percutaneous radiological needle interventions. We compared three guiding methods using an optical‐based navigation system: freehand, using a stereotactic aiming device and active depth control, and using a stereotactic aiming device and passive depth control.</p> </sec> <sec id="rcs1505-sec-0002" sec-type="section"> <title>Methods</title> <p>For each method, 25 punctures were performed on a non‐rigid phantom. Five 1 mm metal screws were used as targets. Time requirements were recorded, and target positioning errors (TPE) were measured on control scans as the distance between needle tip and target.</p> </sec> <sec id="rcs1505-sec-0003" sec-type="section"> <title>Results</title> <p>Time requirements were reduced using the aiming device and passive depth control. The Euclidian TPE was similar for each method (4.6 ± 1.2–4.9 ± 1.7 mm). However, the lateral component was significantly lower when an aiming device was used (2.3 ± 1.3–2.8 ± 1.6 mm with an aiming device vs 4.2 ± 2.0 mm without).</p> </sec> <sec id="rcs1505-sec-0004" sec-type="section"> <title>Discussion</title> <p>Using an aiming device may increase the lateral accuracy of navigated needle insertion. Copyright © 2013 John Wiley &amp; Sons, Ltd.</p> </sec> </abstract>