Study of MRI-compatible Notched Plastic Ultrasonic Stator with FEM Simulation and Holography Validation

Intra-operative image guidance using magnetic resonance imaging (MRI) can significantly enhance the precision of surgical procedures, such as deep brain tumor ablation. However, the powerful magnetic fields and limited space within an MRI scanner require the use of robotic devices to aid surgeons. P...

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Bibliographic Details
Published inarXiv.org
Main Authors Zhao, Zhanyue, Tang, Haimi, Carvalho, Paulo, Furlong, Cosme, Fischer, Gregory S
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 16.08.2024
Subjects
Ablation
Finite element method
Holography
Image enhancement
Magnetic resonance imaging
Piezoelectric motors
Rotors
Stators
Surface waves
Ultrasonic scanners
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Summary:Intra-operative image guidance using magnetic resonance imaging (MRI) can significantly enhance the precision of surgical procedures, such as deep brain tumor ablation. However, the powerful magnetic fields and limited space within an MRI scanner require the use of robotic devices to aid surgeons. Piezoelectric motors are commonly utilized to drive these robots, with piezoelectric ultrasonic motors being particularly notable. These motors consist of a piezoelectric ring stator that is bonded to a rotor through frictional coupling. When the stator is excited at specific frequencies, it generates distinctive mode shapes with surface waves that exhibit both in-plane and out-of-plane displacement, leading to the rotation of the rotor. In this study, we continue our previous work and refine the motor design and performance, we combine finite element modeling (FEM) with stroboscopic and time-averaged digital holography to validate a further plastic-based ultrasonic motor with better rotary performance.
ISSN:2331-8422