NDLI: Catheter localization in the left atrium using an outdated anatomic reference for guidance

Content Provider	IEEE Xplore Digital Library
Author	Koolwal, A.B. Barbagli, F. Carlson, C.R. Liang, D.H.
Copyright Year	2009
Description	Author affiliation: Department of Cardiovascular Medicine, Stanford University, Stanford, CA, USA (Liang, D.H.) \|\| Department of Computer Science, Stanford University, Stanford, CA, USA (Barbagli, F.) \|\| Department of Mechanical Engineering, Stanford University, Stanford, CA, USA (Koolwal, A.B.) \|\| Hansen Medical, Inc., Mountain View, CA, USA (Carlson, C.R.)
Abstract	We present a method for registering real-time ultrasound of the left atrium to an outdated, anatomic surface mesh model, whose shape differs from that of the anatomy. Using an intracardiac echo (ICE) catheter with mounted 6DOF electromagnetic position/orientation sensor (EPS), we acquire images of the left atrium and determine where the ICE catheter must be positioned relative to the surface mesh to generate similar, “virtual” ICE images. Further, we use an affine warping model to infer how the shape of the surface mesh differs from that of the atrium. Our registration and warping algorithm allows us to display EPS-sensorized catheters inside the surface mesh, facilitating guidance for left atrial procedures. By solving for the atrium-to-mesh warping parameters, we ensure that tissue contact in the anatomy is properly displayed as tissue contact in the mesh. After considering less than thirty seconds worth of ICE data, we are able to accurately localize EPS measurements within the surface mesh, despite surface mesh warpings of up to ±20% along and about the principal axes of the left atrium. Further, because our estimation framework is iterative and continuous, our accuracy improves as new data is acquired.
Starting Page	5567
Ending Page	5570
File Size	1588427
Page Count	4
File Format	PDF
ISBN	9781424432967
ISSN	1557170X
DOI	10.1109/IEMBS.2009.5333739
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Catheters Anatomy Computed tomography Ice surface Shape Ultrasonic variables measurement Surface morphology Ultrasonic imaging Image sensors Mesh generation particle filter ablation catheter guidance left atrium ultrasound
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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