Design and Compatibility Evaluation of Magnetic Resonance Imaging-Guided Needle Insertion System

Magnetic resonance imaging (MRI) compatibility and force feedback during surgical procedures are crucial for developing MRI-guided needle insertion system. A new MRI-compatible needle insertion system was presented to provide force feedback and image guide for the safety during surgeries. An ultrasonic motor (USM) based needle insertion system was presented to explore the feasibility of USM as an actuator in MRI scanner. The MRI compatibility and performance of the needle insertion system have been tested in closed-bore MRI scanner. Performance evaluation of system operation includes three main elements: (1) safety of the developed system in the MRI room; (2) MRI compatibility; and (3) reliability and accuracy of needle insertion system. The evaluation of signal-to-noise ratio (SNR) values shows encouraging MRI compatibility of force feedback system and needle insertion system. A position deviation of +/- 1 mm was calculated by measuring the distance between needle tip and target point. The solutions for noise and electromagnetic interference were proven effective for the presented system. The MRI compatibility and safety were satisfied by calculating the MR images and the position accuracy during the insertion system.