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Title: Effects of insertion speed and trocar stiffness on the accuracy of needle position for brachytherapy

Abstract

Purpose: In prostate brachytherapy, accurate positioning of the needle tip to place radioactive seeds at its target site is critical for successful radiation treatment. During the procedure, needle deflection leads to seed misplacement and suboptimal radiation dose to cancerous cells. In practice, radiation oncologists commonly use high-speed hand needle insertion to minimize displacement of the prostate as well as the needle deflection. Effects of speed during needle insertion and stiffness of trocar (a solid rod inside the hollow cannula) on needle deflection are studied. Methods: Needle insertion experiments into phantom were performed using a 2{sup 2} factorial design (2 parameters at 2 levels), with each condition having replicates. Analysis of the deflection data included calculating the average, standard deviation, and analysis of variance (ANOVA) to find significant single and two-way interaction factors. Results: The stiffer tungsten carbide trocar is effective in reducing the average and standard deviation of needle deflection. The fast insertion speed together with the stiffer trocar generated the smallest average and standard deviation for needle deflection for almost all cases. Conclusions: The combination of stiff tungsten carbide trocar and fast needle insertion speed are important to decreasing needle deflection. The knowledge gained from this study can bemore » used to improve the accuracy of needle insertion during brachytherapy procedures.« less

Authors:
; ; ; ;  [1]
  1. Biomedical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 (United States)
Publication Date:
OSTI Identifier:
22098803
Resource Type:
Journal Article
Journal Name:
Medical Physics
Additional Journal Information:
Journal Volume: 39; Journal Issue: 4; Other Information: (c) 2012 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-2405
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; ACCURACY; BRACHYTHERAPY; DESIGN; DOSIMETRY; FLEXIBILITY; INTERACTIONS; MEDICAL PERSONNEL; PHANTOMS; POSITIONING; PROSTATE; RADIATION DOSES; SOLIDS; TUNGSTEN CARBIDES

Citation Formats

McGill, Carl S., Schwartz, Jonathon A., Moore, Jason Z., McLaughlin, Patrick W., Shih, Albert J., Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, State College, Pennsylvania 16802, Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan 48109, and Biomedical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 and Mechanical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109. Effects of insertion speed and trocar stiffness on the accuracy of needle position for brachytherapy. United States: N. p., 2012. Web. doi:10.1118/1.3689812.
McGill, Carl S., Schwartz, Jonathon A., Moore, Jason Z., McLaughlin, Patrick W., Shih, Albert J., Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, State College, Pennsylvania 16802, Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan 48109, & Biomedical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 and Mechanical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109. Effects of insertion speed and trocar stiffness on the accuracy of needle position for brachytherapy. United States. https://doi.org/10.1118/1.3689812
McGill, Carl S., Schwartz, Jonathon A., Moore, Jason Z., McLaughlin, Patrick W., Shih, Albert J., Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, State College, Pennsylvania 16802, Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan 48109, and Biomedical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 and Mechanical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109. 2012. "Effects of insertion speed and trocar stiffness on the accuracy of needle position for brachytherapy". United States. https://doi.org/10.1118/1.3689812.
@article{osti_22098803,
title = {Effects of insertion speed and trocar stiffness on the accuracy of needle position for brachytherapy},
author = {McGill, Carl S. and Schwartz, Jonathon A. and Moore, Jason Z. and McLaughlin, Patrick W. and Shih, Albert J. and Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, State College, Pennsylvania 16802 and Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan 48109 and Biomedical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 and Mechanical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109},
abstractNote = {Purpose: In prostate brachytherapy, accurate positioning of the needle tip to place radioactive seeds at its target site is critical for successful radiation treatment. During the procedure, needle deflection leads to seed misplacement and suboptimal radiation dose to cancerous cells. In practice, radiation oncologists commonly use high-speed hand needle insertion to minimize displacement of the prostate as well as the needle deflection. Effects of speed during needle insertion and stiffness of trocar (a solid rod inside the hollow cannula) on needle deflection are studied. Methods: Needle insertion experiments into phantom were performed using a 2{sup 2} factorial design (2 parameters at 2 levels), with each condition having replicates. Analysis of the deflection data included calculating the average, standard deviation, and analysis of variance (ANOVA) to find significant single and two-way interaction factors. Results: The stiffer tungsten carbide trocar is effective in reducing the average and standard deviation of needle deflection. The fast insertion speed together with the stiffer trocar generated the smallest average and standard deviation for needle deflection for almost all cases. Conclusions: The combination of stiff tungsten carbide trocar and fast needle insertion speed are important to decreasing needle deflection. The knowledge gained from this study can be used to improve the accuracy of needle insertion during brachytherapy procedures.},
doi = {10.1118/1.3689812},
url = {https://www.osti.gov/biblio/22098803}, journal = {Medical Physics},
issn = {0094-2405},
number = 4,
volume = 39,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2012},
month = {Sun Apr 15 00:00:00 EDT 2012}
}