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Proceedings Paper

Model-based correction of ultrasound image deformations due to probe pressure
Author(s): Jawad Dahmani; Yvan Petit; Catherine Laporte
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Paper Abstract

Freehand 3D ultrasound (US) consists in acquiring a US volume by moving a tracked conventional 2D probe over an area of interest. To maintain good acoustic coupling between the probe and the skin, the operator applies pressure on the skin with the probe. This pressure deforms the underlying tissues in a variable way across the excursion of the probe, which, in turn, leads to inconsistencies in the volume. To address this problem, this paper proposes a method to estimate the deformation field sustained by each image with respect to a reference deformation free image. The method is based on a 2D biomechanical model that takes into account the mechanical parameters of the tissues depicted in the image to predict a realistic deformation field. These parameters are estimated along with the deformation field such as to maximize the mutual information between the reference and the corrected images. The image is then corrected by applying the inverse deformation field. Preliminary validation was conducted with synthetic US images generated using a 3D biomechanical model. Results show that the proposed method improves image correction compared to a purely image-based method.

Paper Details

Date Published: 24 February 2017
PDF: 9 pages
Proc. SPIE 10133, Medical Imaging 2017: Image Processing, 101331D (24 February 2017); doi: 10.1117/12.2254636
Show Author Affiliations
Jawad Dahmani, École de Technologie Supérieure (Canada)
Yvan Petit, École de Technologie Supérieure (Canada)
Catherine Laporte, École de Technologie Supérieure (Canada)

Published in SPIE Proceedings Vol. 10133:
Medical Imaging 2017: Image Processing
Martin A. Styner; Elsa D. Angelini, Editor(s)

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