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Technical Note: Error metrics for estimating the accuracy of needle/instrument placement during transperineal magnetic resonance/ultrasound-guided prostate interventions

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journal contribution
posted on 22.10.2018 by Ester Bonmati, Yipeng Hu, Barbara Villarini, Rachael Rodell, Paul Martin, Lianghao Han, Ian Donaldson, Hashim U. Ahmed, Caroline M. Moore, Mark Emberton, Dean C. Barratt
Purpose Image‐guided systems that fuse magnetic resonance imaging (MRI) with three‐dimensional (3D) ultrasound (US) images for performing targeted prostate needle biopsy and minimally invasive treatments for prostate cancer are of increasing clinical interest. To date, a wide range of different accuracy estimation procedures and error metrics have been reported, which makes comparing the performance of different systems difficult. Methods A set of nine measures are presented to assess the accuracy of MRI‐US image registration, needle positioning, needle guidance, and overall system error, with the aim of providing a methodology for estimating the accuracy of instrument placement using a MR/US‐guided transperineal approach. Results Using the SmartTarget fusion system, an MRI‐US image alignment error was determined to be 2.0 ± 1.0 mm (mean ± SD), and an overall system instrument targeting error of 3.0 ± 1.2 mm. Three needle deployments for each target phantom lesion was found to result in a 100% lesion hit rate and a median predicted cancer core length of 5.2 mm. Conclusions The application of a comprehensive, unbiased validation assessment for MR/US guided systems can provide useful information on system performance for quality assurance and system comparison. Furthermore, such an analysis can be helpful in identifying relationships between these errors, providing insight into the technical behavior of these systems.

Funding

This publication presents independent research supported by the Health Innovation Challenge (HIC) Fund (Grant Ref. HICF-T4-310), a parallel funding partnership between the Department of Health and the Wellcome Trust. The research was undertaken at UCL/ULCH who received a proportion of funding from the Department of Health’s NIHR Biomedical Research Centres funding scheme.

History

School

  • Science

Department

  • Computer Science

Published in

Medical Physics

Volume

45

Issue

4

Pages

1408 - 1414

Citation

BONMATI, E. ... et al, 2018. Technical Note: Error metrics for estimating the accuracy of needle/instrument placement during transperineal magnetic resonance/ultrasound-guided prostate interventions. Medical Physics, 45 (4), pp.1408-1414.

Publisher

Wiley © American Association of Physicists in Medicine

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2018-02-14

Notes

This is the peer reviewed version of the following article: BONMATI, E. ... et al, 2018. Technical Note: Error metrics for estimating the accuracy of needle/instrument placement during transperineal magnetic resonance/ultrasound-guided prostate interventions. Medical Physics, 45 (4), pp.1408-1414, which has been published in final form at https://doi.org/10.1002/mp.12814. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.

ISSN

0094-2405

eISSN

2473-4209

Language

en

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