title: An incremental method for registering electroanatomic mapping data to surface mesh models of the left atrium.
abstract: We present a method for registering position and orientation data collected from an electroanatomic mapping system (EMS) to a surface mesh based on segmented Computed Tomography (CT) or Magnetic Resonance (MR) images of the left atrium. Our algorithm is based on the Unscented Particle Filter (UPF) for stochastic state estimation. Using an intracardiac echo (ICE) ultrasound catheter with mounted mapping sensor, we acquire ultrasound images of the atrium from multiple configurations and iteratively determine the catheter's pose with respect to anatomy. After considering less than a minute's worth of ICE data, the algorithm converges to an accurate pose estimate which, in turn, yields the registration parameters transforming EMS coordinates to mesh coordinates. The iterative framework of the UPF allows us to be robust to unmodeled EMS noise and drift, problems which complicate traditional registration methods assuming regularity in image data structure.
authors.affiliation: Department of Mechanical Engineering, Stanford University, USA.
authors.forename: Aditya B
authors.initials: AB
authors.lastname: Koolwal
authors.forename: Federico
authors.initials: F
authors.lastname: Barbagli
authors.forename: Christopher R
authors.initials: CR
authors.lastname: Carlson
authors.forename: David H
authors.initials: DH
authors.lastname: Liang
mesh_terms: D016275:Atrial Function; D018780:Body Surface Potential Mapping / Q000379:methods*; D003198:Computer Simulation; D003952:Diagnostic Imaging / Q000379:methods*; D020342:Finite Element Analysis; D006325:Heart Atria / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D006329:Heart Conduction System / Q000033:anatomy & histology* / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008955:Models, Cardiovascular; D013382:Subtraction Technique; D014057:Tomography, X-Ray Computed / Q000379:methods