Radio-Frequency Response Characterization and Design of Actuation Coils for a Novel MRI Guided Robotic Catheter System
| Autor: | Kamath, Sanjana K. |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Biomedical Engineering
Biomedical Research Electrical Engineering Electromagnetics Electromagnetism Engineering Medical Imaging Robotics Robots Surgery MRI catheter ablation cardiac fibrillation MRI guided catheter robotic catheter radio-frequency RF micro-coils microcoils electromagnetic actuation electromagnet actuation surgical robotics fibrillation cardiac catheter MRI actuated RF safety |
| Druh dokumentu: | Text |
| Popis: | Atrial fibrillation is a common cardiac condition which can place the patient at risk for many serious medical issues. Current interventional procedures employ cardiac ablation catheters guided using x-ray fluoroscopy imaging, which generates restricted two-dimensional images of the heart, and exposes the patient to a high dose of radiation. Three-dimensional catheter position data can be obtained and radiation exposure can be mitigated by using Magnetic Resonance Imaging (MRI) for this procedure. The magnetic field of the MRI machine can be strategically leveraged to steer and actuate a robotic ablation catheter, by energizing small embedded electromagnetic coils within the catheter tip. These coils however, may undesirably interact with the MRI machine’s rotating radio-frequency (RF) magnetic field, potentially leading to excessive heating of the catheter or power supply damage. This thesis aims to characterize the RF response of actuation coils used in a novel MRI guided catheter system, and design an actuation coil set prototype which can safely operate in the MRI environment. The proposed final actuation coil set consists of 3 coils wound over the catheter body, and aims to improve the RF behavior of the coil set by implementing improved design elements such as a new winding pattern, wire gauge variation, and utilization of capacitors within the system. The final prototype presented successfully meetsthe required standards and is able to perform desired actuations. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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