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Proceedings Paper

Accuracy validation for MRI-guided robotic prostate biopsy
Author(s): Helen Xu; Andras Lasso; Siddharth Vikal; Peter Guion; Axel Krieger; Aradhana Kaushal; Louis L. Whitcomb; Gabor Fichtinger
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Paper 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.

Paper Details

Date Published: 23 February 2010
PDF: 8 pages
Proc. SPIE 7625, Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling, 762517 (23 February 2010); doi: 10.1117/12.844251
Show Author Affiliations
Helen Xu, Queen's Univ. (Canada)
Andras Lasso, Queen's Univ. (Canada)
Siddharth Vikal, Queen's Univ. (Canada)
Peter Guion, National Institutes of Health (United States)
Axel Krieger, Sentinelle Medical Inc. (Canada)
Aradhana Kaushal, National Institutes of Health (United States)
Louis L. Whitcomb, The Johns Hopkins Univ. (United States)
Gabor Fichtinger, Queen's Univ. (Canada)
The Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 7625:
Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling
Kenneth H. Wong; Michael I. Miga, Editor(s)

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