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Proceedings Paper

Towards real-time 3D US-CT registration on the beating heart for guidance of minimally invasive cardiac interventions
Author(s): Feng Li; Pencilla Lang; Martin Rajchl; Elvis C. S. Chen; Gerard Guiraudon; Terry M. Peters
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Paper Abstract

Compared to conventional open-heart surgeries, minimally invasive cardiac interventions cause less trauma and sideeffects to patients. However, the direct view of surgical targets and tools is usually not available in minimally invasive procedures, which makes image-guided navigation systems essential. The choice of imaging modalities used in the navigation systems must consider the capability of imaging soft tissues, spatial and temporal resolution, compatibility and flexibility in the OR, and financial cost. In this paper, we propose a new means of guidance for minimally invasive cardiac interventions using 3D real-time ultrasound images to show the intra-operative heart motion together with preoperative CT image(s) employed to demonstrate high-quality 3D anatomical context. We also develop a method to register intra-operative ultrasound and pre-operative CT images in close to real-time. The registration method has two stages. In the first, anatomical features are segmented from the first frame of ultrasound images and the CT image(s). A feature based registration is used to align those features. The result of this is used as an initialization in the second stage, in which a mutual information based registration is used to register every ultrasound frame to the CT image(s). A GPU based implementation is used to accelerate the registration.

Paper Details

Date Published: 17 February 2012
PDF: 8 pages
Proc. SPIE 8316, Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling, 831615 (17 February 2012); doi: 10.1117/12.911605
Show Author Affiliations
Feng Li, The Univ. of Western Ontario (Canada)
Robarts Research Institute (Canada)
Pencilla Lang, The Univ. of Western Ontario (Canada)
Robarts Research Institute (Canada)
Martin Rajchl, The Univ. of Western Ontario (Canada)
Robarts Research Institute (Canada)
Elvis C. S. Chen, Robarts Research Institute (Canada)
Gerard Guiraudon, Robarts Research Institute (Canada)
Lawson Health Research Institute (Canada)
The Univ. of Western Ontario (Canada)
Terry M. Peters, The Univ. of Western Ontario (Canada)
Robarts Research Institute (Canada)
Lawson Health Research Institute (Canada)


Published in SPIE Proceedings Vol. 8316:
Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling
David R. Holmes; Kenneth H. Wong, Editor(s)

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