13 March 2009 A novel technique for the three-dimensional visualization of radio-frequency ablation lesions using delayed enhancement magnetic resonance imaging
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Abstract
The detection of radio-frequency ablation lesions has been shown to be feasible using delayed enhancement magnetic resonance imaging (MRI). However, it is the determination of the lesion patterns that is of import for correlation with clinical outcome and location of gaps. Visualisation of ablation patterns on two-dimensional (2D) MR images is not intuitive. We present a technique for the three-dimensional (3D) visualisation of ablation patterns by creating a surface from a segmentation of the cardiac chamber of interest, fusing with the delayed enhancement MRI and integrating the MR signal along vectors normal to the cardiac surface. Areas of delayed enhancement will have a larger integral value than healthy myocardium. Maximum intensity projection (MIP) values were used to colour code the cardiac surface for 3D visualisation of the areas of delayed enhancement. The technique was applied to three patients with a cardiac arrhythmia, with successful visualisation of the ablation pattern. Patterns of delayed enhancement were correlated with ablation points derived from electro-anatomical mapping systems (EAMS) and were found to have similar patterns. This visualisation technique allows for the intuitive visualisation of ablation lesions and has many applications for use in electrophysiology.
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Benjamin R. Knowles, Benjamin R. Knowles, Dennis Caulfield, Dennis Caulfield, Matthew Ginks, Matthew Ginks, Michael Cooklin, Michael Cooklin, Julian Bostock, Julian Bostock, Aldo Rinaldi, Aldo Rinaldi, Jaswinder Gill, Jaswinder Gill, Reza Razavi, Reza Razavi, Tobias Schaeffter, Tobias Schaeffter, Kawal S. Rhode, Kawal S. Rhode, } "A novel technique for the three-dimensional visualization of radio-frequency ablation lesions using delayed enhancement magnetic resonance imaging", Proc. SPIE 7261, Medical Imaging 2009: Visualization, Image-Guided Procedures, and Modeling, 72610E (13 March 2009); doi: 10.1117/12.812272; https://doi.org/10.1117/12.812272
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