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Title: Electromagnetic-Tracked Biopsy under Ultrasound Guidance: Preliminary Results

Abstract

Purpose: This study was designed to evaluate the accuracy and safety of electromagnetic needle tracking for sonographically guided percutaneous liver biopsies. Methods: We performed 23 consecutive ultrasound-guided liver biopsies for liver nodules with an electromagnetic tracking of the needle. A sensor placed at the tip of a sterile stylet (18G) inserted in a coaxial guiding trocar (16G) used for biopsy was localized in real time relative to the ultrasound imaging plane, thanks to an electromagnetic transmitter and two sensors on the ultrasound probe. This allows for electronic display of the needle tip location and the future needle path overlaid on the real-time ultrasound image. Distance between needle tip position and its electronic display, number of needle punctures, number of needle pull backs for redirection, technical success (needle positioned in the target), diagnostic success (correct histopathology result), procedure time, and complication were evaluated according to lesion sizes, depth and location, operator experience, and 'in-plane' or 'out-of-plane' needle approach. Results: Electronic display was always within 2 mm from the real position of the needle tip. The technical success rate was 100%. A single needle puncture without repuncture was used in all patients. Pull backs were necessary in six patients (26%) to obtainmore » correct needle placement. The overall diagnostic success rate was 91%. The overall true-positive, true-negative, false-negative, and failure rates of the biopsy were 100% (19/19) 100% (2/2), 0% (0/23), and 9% (2/23). The median total procedure time from the skin puncture to the needle in the target was 30 sec (from 5-60 s). Lesion depth and localizations, operator experience, in-plane or out-of-plane approach did not affect significantly the technical, diagnostic success, or procedure time. Even when the tumor size decreased, the procedure time did not increase. Conclusions: Electromagnetic-tracked biopsy is accurate to determine needle tip position and allows fast and accurate needle placement in targeted liver nodules.« less

Authors:
; ; ; ; ;  [1]
  1. Gustave Roussy Institute (France)
Publication Date:
OSTI Identifier:
22066582
Resource Type:
Journal Article
Journal Name:
Cardiovascular and Interventional Radiology
Additional Journal Information:
Journal Volume: 35; Journal Issue: 4; Other Information: Copyright (c) 2012 Springer Science+Business Media, LLC and the Cardiovascular and Interventional Radiological Society of Europe (CIRSE); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0174-1551
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; BIOPSY; IMAGES; LIVER; NEOPLASMS; PATIENTS; SKIN; ULTRASONOGRAPHY

Citation Formats

Hakime, Antoine, E-mail: thakime@yahoo.com, Deschamps, Frederic, Marques De Carvalho, Enio Garcia, Barah, Ali, Auperin, Anne, and Baere, Thierry De. Electromagnetic-Tracked Biopsy under Ultrasound Guidance: Preliminary Results. United States: N. p., 2012. Web. doi:10.1007/S00270-011-0278-8.
Hakime, Antoine, E-mail: thakime@yahoo.com, Deschamps, Frederic, Marques De Carvalho, Enio Garcia, Barah, Ali, Auperin, Anne, & Baere, Thierry De. Electromagnetic-Tracked Biopsy under Ultrasound Guidance: Preliminary Results. United States. doi:10.1007/S00270-011-0278-8.
Hakime, Antoine, E-mail: thakime@yahoo.com, Deschamps, Frederic, Marques De Carvalho, Enio Garcia, Barah, Ali, Auperin, Anne, and Baere, Thierry De. Wed . "Electromagnetic-Tracked Biopsy under Ultrasound Guidance: Preliminary Results". United States. doi:10.1007/S00270-011-0278-8.
@article{osti_22066582,
title = {Electromagnetic-Tracked Biopsy under Ultrasound Guidance: Preliminary Results},
author = {Hakime, Antoine, E-mail: thakime@yahoo.com and Deschamps, Frederic and Marques De Carvalho, Enio Garcia and Barah, Ali and Auperin, Anne and Baere, Thierry De},
abstractNote = {Purpose: This study was designed to evaluate the accuracy and safety of electromagnetic needle tracking for sonographically guided percutaneous liver biopsies. Methods: We performed 23 consecutive ultrasound-guided liver biopsies for liver nodules with an electromagnetic tracking of the needle. A sensor placed at the tip of a sterile stylet (18G) inserted in a coaxial guiding trocar (16G) used for biopsy was localized in real time relative to the ultrasound imaging plane, thanks to an electromagnetic transmitter and two sensors on the ultrasound probe. This allows for electronic display of the needle tip location and the future needle path overlaid on the real-time ultrasound image. Distance between needle tip position and its electronic display, number of needle punctures, number of needle pull backs for redirection, technical success (needle positioned in the target), diagnostic success (correct histopathology result), procedure time, and complication were evaluated according to lesion sizes, depth and location, operator experience, and 'in-plane' or 'out-of-plane' needle approach. Results: Electronic display was always within 2 mm from the real position of the needle tip. The technical success rate was 100%. A single needle puncture without repuncture was used in all patients. Pull backs were necessary in six patients (26%) to obtain correct needle placement. The overall diagnostic success rate was 91%. The overall true-positive, true-negative, false-negative, and failure rates of the biopsy were 100% (19/19) 100% (2/2), 0% (0/23), and 9% (2/23). The median total procedure time from the skin puncture to the needle in the target was 30 sec (from 5-60 s). Lesion depth and localizations, operator experience, in-plane or out-of-plane approach did not affect significantly the technical, diagnostic success, or procedure time. Even when the tumor size decreased, the procedure time did not increase. Conclusions: Electromagnetic-tracked biopsy is accurate to determine needle tip position and allows fast and accurate needle placement in targeted liver nodules.},
doi = {10.1007/S00270-011-0278-8},
journal = {Cardiovascular and Interventional Radiology},
issn = {0174-1551},
number = 4,
volume = 35,
place = {United States},
year = {2012},
month = {8}
}