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Proceedings Article

Accuracy validation for MRI-guided robotic prostate biopsy

[+] Author Affiliations
Helen Xu, Andras Lasso, Siddharth Vikal

Queen's Univ. (Canada)

Peter Guion, Aradhana Kaushal

National Institutes of Health (USA)

Axel Krieger

Sentinelle Medical Inc. (Canada)

Louis L. Whitcomb

The Johns Hopkins Univ. (USA)

Gabor Fichtinger

Queen's Univ. (Canada) and The Johns Hopkins Univ. (USA)

Proc. SPIE 7625, Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling, 762517 (February 23, 2010); doi:10.1117/12.844251
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From Conference Volume 7625

  • Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling
  • San Diego, California, USA | February 13, 2010

abstract

We report a quantitative evaluation of the clinical accuracy of a MRI-guided robotic prostate biopsy system that has been in use for over five years at the U.S. National Cancer Institute. A two-step rigid volume registration using mutual information between the pre and post needle insertion images was performed. Contour overlays of the prostate before and after registration were used to validate the registration. A total of 20 biopsies from 5 patients were evaluated. The maximum registration error was 2 mm. The mean biopsy target displacement, needle placement error, and biopsy error was 5.4 mm, 2.2 mm, and 5.1 mm respectively. The results show that the pre-planned biopsy target did dislocate during the procedure and therefore causing biopsy errors.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Helen Xu ; Andras Lasso ; Siddharth Vikal ; Peter Guion ; Axel Krieger, et al.
"Accuracy validation for MRI-guided robotic prostate biopsy", Proc. SPIE 7625, Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling, 762517 (February 23, 2010); doi:10.1117/12.844251; http://dx.doi.org/10.1117/12.844251


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