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Proceedings Paper

Real-time registration by tracking for MR-guided cardiac interventions
Author(s): Desmond Chung; Janakan Satkunasingham; Graham Wright; Perry Radau
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Paper Abstract

Cardiac interventional procedures such as myocardial stem cell delivery and radiofrequency ablation require a high degree of accuracy and efficiency. Real-time, 2-D MR technology is being developed to guide such procedures; the associated challenges include the relatively low resolution and image quality in real-time images. Real-time MR guidance can be enhanced by acquiring a 4-D (3-D + phase) volume prior to the procedure and aligning it to the 2-D real-time images, so that corresponding features in the prior volume can be integrated into the real-time image visualization. This technique provides spatial context with high resolution and SNR. A left ventricular (LV) myocardial wall contour tracking system was developed to maintain spatial alignment of prior volume images to real-time MR images. Over 9 test images sequences, each comprising 100 frames of simulated respiratory motion, the tracker maintained alignment with a mean displacement error of 1.61mm in a region of interest around the LV, as compared to a mean displacement error of 5.2mm without tracking.

Paper Details

Date Published: 10 March 2006
PDF: 12 pages
Proc. SPIE 6144, Medical Imaging 2006: Image Processing, 614419 (10 March 2006); doi: 10.1117/12.655601
Show Author Affiliations
Desmond Chung, Sunnybrook and Women's Health Sciences Ctr. (Canada)
Janakan Satkunasingham, Sunnybrook and Women's Health Sciences Ctr. (Canada)
Graham Wright, Sunnybrook and Women's Health Sciences Ctr. (Canada)
Perry Radau, Sunnybrook and Women's Health Sciences Ctr. (Canada)

Published in SPIE Proceedings Vol. 6144:
Medical Imaging 2006: Image Processing
Joseph M. Reinhardt; Josien P. W. Pluim, Editor(s)

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