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Proceedings Paper

3D transrectal ultrasound prostate biopsy using a mechanical imaging and needle-guidance system
Author(s): Jeffrey Bax; Derek Cool; Lori Gardi; Jacques Montreuil; Elena Gil; Jeremy Bluvol; Kerry Knight; David Smith; Cesare Romagnoli; Aaron Fenster
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Paper Abstract

Prostate biopsy procedures are generally limited to 2D transrectal ultrasound (TRUS) imaging for biopsy needle guidance. This limitation results in needle position ambiguity and an insufficient record of biopsy core locations in cases of prostate re-biopsy. We have developed a multi-jointed mechanical device that supports a commercially available TRUS probe with an integrated needle guide for precision prostate biopsy. The device is fixed at the base, allowing the joints to be manually manipulated while fully supporting its weight throughout its full range of motion. Means are provided to track the needle trajectory and display this trajectory on a corresponding TRUS image. This allows the physician to aim the needle-guide at predefined targets within the prostate, providing true 3D navigation. The tracker has been designed for use with several end-fired transducers that can be rotated about the longitudinal axis of the probe to generate 3D images. The tracker reduces the variability associated with conventional hand-held probes, while preserving user familiarity and procedural workflow. In a prostate phantom, biopsy needles were guided to within 2 mm of their targets, and the 3D location of the biopsy core was accurate to within 3 mm. The 3D navigation system is validated in the presence of prostate motion in a preliminary patient study.

Paper Details

Date Published: 17 March 2008
PDF: 11 pages
Proc. SPIE 6918, Medical Imaging 2008: Visualization, Image-Guided Procedures, and Modeling, 691825 (17 March 2008); doi: 10.1117/12.772759
Show Author Affiliations
Jeffrey Bax, Robarts Research Institute (Canada)
Univ. of Western Ontario (Canada)
Derek Cool, Robarts Research Institute (Canada)
Univ. of Western Ontario (Canada)
Lori Gardi, Robarts Research Institute (Canada)
Jacques Montreuil, Robarts Research Institute (Canada)
Elena Gil, Robarts Research Institute (Canada)
Jeremy Bluvol, Robarts Research Institute (Canada)
Kerry Knight, Robarts Research Institute (Canada)
David Smith, Robarts Research Institute (Canada)
Cesare Romagnoli, London Health Sciences Ctr. (Canada)
Aaron Fenster, Robarts Research Institute (Canada)
Univ. of Western Ontario (Canada)

Published in SPIE Proceedings Vol. 6918:
Medical Imaging 2008: Visualization, Image-Guided Procedures, and Modeling
Michael I. Miga; Kevin Robert Cleary, Editor(s)

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