title: Electrophysiology Catheter Detection and Reconstruction From Two Views in Fluoroscopic Images.
abstract: Electrophysiology (EP) studies and catheter ablation have become important treatment options for several types of cardiac arrhythmias. We present a novel image-based approach for automatic detection and 3-D reconstruction of EP catheters where the physician marks the catheter to be reconstructed by a single click in each image. The result can be used to provide 3-D information for enhanced navigation throughout EP procedures. Our approach involves two X-ray projections acquired from different angles, and it is based on two steps: First, we detect the catheter in each view after manual initialization using a graph-search method. Then, the detection results are used to reconstruct a full 3-D model of the catheter based on automatically determined point pairs for triangulation. An evaluation on 176 different clinical fluoroscopic images yielded a detection rate of 83.4%. For measuring the error, we used the coupling distance which is a more accurate quality measure than the average point-wise distance to a reference. For successful outcomes, the 2-D detection error was 1.7 mm ±1.2 mm. Using successfully detected catheters for reconstruction, we obtained a reconstruction error of 1.8 mm ±1.1 mm on phantom data. On clinical data, our method yielded a reconstruction error of 2.2 mm ±2.2 mm.
authors.forename: Matthias
authors.initials: M
authors.lastname: Hoffmann
authors.forename: Alexander
authors.initials: A
authors.lastname: Brost
authors.forename: Martin
authors.initials: M
authors.lastname: Koch
authors.forename: Felix
authors.initials: F
authors.lastname: Bourier
authors.forename: Andreas
authors.initials: A
authors.lastname: Maier
authors.forename: Klaus
authors.initials: K
authors.lastname: Kurzidim
authors.forename: Norbert
authors.initials: N
authors.lastname: Strobel
authors.forename: Joachim
authors.initials: J
authors.lastname: Hornegger
mesh_terms: D000465:Algorithms; D017115:Catheter Ablation / Q000379:methods*; D004562:Electrocardiography; D005471:Fluoroscopy / Q000379:methods*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D019047:Phantoms, Imaging; D025321:Surgery, Computer-Assisted / Q000379:methods*