Image-based electrode array tracking for epicardial electrophysiological mapping in minimally invasive arrhythmia surgery
| Autor: | Etsuko Kobayashi, Shinichi Takamoto, Kazuhiro Taniguchi, Hongen Liao, Paul de Lange, Sanghyun Joung, Takehiro Ando, Ichiro Sakuma, Hongho Kim, Shunei Kyo, Minoru Ono |
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| Rok vydání: | 2010 |
| Předmět: |
Epicardial Mapping
Computer science Swine Biomedical Engineering Health Informatics Tracking (particle physics) Mapping algorithm Image Interpretation Computer-Assisted Electrode array Animals Minimally Invasive Surgical Procedures Radiology Nuclear Medicine and imaging Computer vision Arrhythmia surgery Cardiac Surgical Procedures Electrodes business.industry Reproducibility of Results Tracking system Arrhythmias Cardiac General Medicine Computer Graphics and Computer-Aided Design Computer Science Applications Optical tracking Disease Models Animal Mapping system Surgery Computer Vision and Pattern Recognition Artificial intelligence business Image based |
| Zdroj: | International journal of computer assisted radiology and surgery. 6(1) |
| ISSN: | 1861-6429 |
| Popis: | Electrophysiological mapping is effective in realizing a precise minimally invasive arrhythmia surgery. Recently, an epicardial electrophysiological mapping system for minimally invasive arrhythmia surgery was reported. The system requires a small electrode array, a tracking system and a global mapping algorithm. The optical tracking system employed in the research requires line of sight and complicated configuration. This paper proposes a new tracking method for locating an electrode array.We developed a small electrode array and optical markers. Center points of respective optical markers and the electrode array are tracked via an endoscopic stream and calculated in image space. The orientation of the electrode array is calculated using the dot product between the vector joining two center points of two upper optical markers and the vector joining two end points of the longest edge of the electrode array.Mean tracking errors of position and orientation of the electrode array were 0.51 mm and 0.64°, respectively. And the processing time was constant at 46 ms per frame. Our method could successfully track the electrode array on the epicardium during in vivo experiment and a global epicardial electrophysiological map was reconstructed from separately measured epicardial electrograms by the small electrode array.An image-based tracking method for locating an electrode array was proposed. Tracking accuracy, processing time and applicability to surgical environment of our method proved to be acceptable. Consequently, our method enables the electrode array tracking system to be simplified with no separate tracking system. |
| Databáze: | OpenAIRE |
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