title: 3-D respiratory motion compensation during EP procedures by image-based 3-D lasso catheter model generation and tracking.
abstract: Radio-frequency catheter ablation of the pulmonary veins attached to the left atrium is usually carried out under fluoroscopy guidance. Two-dimensional X-ray navigation may involve overlay images derived from a static pre-operative 3-D volumetric data set to add anatomical details. However, respiratory motion may impair the utility of static overlay images for catheter navigation. We developed a system for image-based 3-D motion estimation and compensation as a solution to this problem for which no previous solution is yet known. It is based on 3-D catheter tracking involving 2-D/3-D registration. A biplane X-ray C-arm system is used to image a special circumferential (lasso) catheter from two directions. In the first step of the method, a 3-D model of the device is reconstructed. 3-D respiratory motion at the site of ablation is then estimated by tracking the reconstructed model in 3-D from biplane fluoroscopy. In our experiments, the circumferential catheter was tracked in 231 biplane fluoro frames (462 monoplane fluoro frames) with an average 2-D tracking error of 1.0 mm +/- 0.5 mm.
authors.affiliation: Chair of Pattern Recognition, Department of Computer Science, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany. Alexander.Brost@informatik.uni-erlangen.de
authors.forename: Alexander
authors.initials: A
authors.lastname: Brost
authors.forename: Rui
authors.initials: R
authors.lastname: Liao
authors.forename: Joachim
authors.initials: J
authors.lastname: Hornegger
authors.forename: Norbert
authors.initials: N
authors.lastname: Strobel
mesh_terms: D000465:Algorithms; D016477:Artifacts; D001185:Artificial Intelligence; D001281:Atrial Fibrillation / Q000000981:diagnostic imaging* / Q000601:surgery*; D017115:Catheter Ablation / Q000379:methods*; D003198:Computer Simulation; D006329:Heart Conduction System / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008955:Models, Cardiovascular; D009068:Movement; D010363:Pattern Recognition, Automated / Q000379:methods; D011667:Pulmonary Veins / Q000000981:diagnostic imaging / Q000601:surgery; D011856:Radiographic Image Enhancement / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D015203:Reproducibility of Results; D055425:Respiratory-Gated Imaging Techniques / Q000379:methods*; D012680:Sensitivity and Specificity; D013382:Subtraction Technique; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods