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Proceedings Paper

A shape-based statistical method to retrieve 2D TRUS-MR slice correspondence for prostate biopsy
Author(s): Jhimli Mitra; Abhilash Srikantha; Désiré Sidibé; Robert Martí; Arnau Oliver; Xavier Lladó; Soumya Ghose; Joan C. Vilanova; Josep Comet; Fabrice Meriaudeau
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Paper Abstract

This paper presents a method based on shape-context and statistical measures to match interventional 2D Trans Rectal Ultrasound (TRUS) slice during prostate biopsy to a 2D Magnetic Resonance (MR) slice of a pre-acquired prostate volume. Accurate biopsy tissue sampling requires translation of the MR slice information on the TRUS guided biopsy slice. However, this translation or fusion requires the knowledge of the spatial position of the TRUS slice and this is only possible with the use of an electro-magnetic (EM) tracker attached to the TRUS probe. Since, the use of EM tracker is not common in clinical practice and 3D TRUS is not used during biopsy, we propose to perform an analysis based on shape and information theory to reach close enough to the actual MR slice as validated by experts. The Bhattacharyya distance is used to find point correspondences between shape-context representations of the prostate contours. Thereafter, Chi-square distance is used to find out those MR slices where the prostates closely match with that of the TRUS slice. Normalized Mutual Information (NMI) values of the TRUS slice with each of the axial MR slices are computed after rigid alignment and consecutively a strategic elimination based on a set of rules between the Chi-square distances and the NMI leads to the required MR slice. We validated our method for TRUS axial slices of 15 patients, of which 11 results matched at least one experts validation and the remaining 4 are at most one slice away from the expert validations.

Paper Details

Date Published: 14 February 2012
PDF: 9 pages
Proc. SPIE 8314, Medical Imaging 2012: Image Processing, 83143M (14 February 2012); doi: 10.1117/12.911176
Show Author Affiliations
Jhimli Mitra, Le2i, CNRS, Univ. de Bourgogne (France)
Univ. de Girona (Spain)
Abhilash Srikantha, Le2i, CNRS, Univ. de Bourgogne (France)
Désiré Sidibé, Le2i, CNRS, Univ. de Bourgogne (France)
Robert Martí, Univ. de Girona (Spain)
Arnau Oliver, Univ. de Girona (Spain)
Xavier Lladó, Univ. de Girona (Spain)
Soumya Ghose, Le2i, CNRS, Univ. de Bourgogne (France)
Univ. de Girona (Spain)
Joan C. Vilanova, Girona Magnetic Resonance Ctr. (Spain)
Josep Comet, Hospital Dr. Josep Trueta (Spain)
Fabrice Meriaudeau, Le2i, CNRS, Univ. de Bourgogne (France)

Published in SPIE Proceedings Vol. 8314:
Medical Imaging 2012: Image Processing
David R. Haynor; Sébastien Ourselin, Editor(s)

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