Journal
INTERNATIONAL JOURNAL OF COMPUTER ASSISTED RADIOLOGY AND SURGERY
Volume 13, Issue 6, Pages 797-804Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11548-018-1757-z
Keywords
Cardiac electrophysiology; Robotic catheterization; Model-based control; Model-free control; Endoscopic view; MR Safe
Funding
- Croucher Foundation
- Research Grants Council (RGC) of Hong Kong [17202317, 17227616, 27209515]
- Aptorum Group Limited
- Signate Life Sciences Limited
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In cardiac electrophysiology, a long and flexible catheter is delivered to a cardiac chamber for the treatment of arrhythmias. Although several robot-assisted platforms have been commercialized, the disorientation in tele-operation is still not well solved. We propose a validation platform for robot-assisted cardiac EP catheterization, integrating a customized MR Safe robot, a standard clinically used EP catheter, and a human-robot interface. Both model-based and model-free control methods are implemented in the platform for quantitative evaluation and comparison. The model-based and model-free control methods were validated by subject test (ten participants), in which the subjects have to perform a simulated radiofrequency ablation task using both methods. A virtual endoscopic view of the catheter is also provided to enhance hand-to-eye coordination. Assessment indices for targeting accuracy and efficiency were acquired for the evaluation. (1) Accuracy: The average distance measured from catheter tip to the closest lesion target during ablation of model-free method was 19.1% shorter than that of model-based control. (2) Efficiency: The model-free control reduced the total missed targets by 35.8% and the maximum continuously missed targets by 46.2%, both indices corresponded to a low p value (). The model-free method performed better in terms of both accuracy and efficiency, indicating the model-free control could adapt to soft interaction with environment, as compared with the model-based control that does not consider contacts.
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