This paper introduces a new type of nonmagnetic actuator for MRI interventions. Ultrasonic and piezoelectric motors are one the most commonly used actuators in MRI applications. However, most of these actuators are only MRI-safe, which means they cannot be operated while imaging as they cause significant visual artifacts. To cope with this issue, we developed a new pneumatic rotary servo-motor (based on the Tesla turbine) that can be effectively used during continuous MR imaging. We thoroughly tested the performance and magnetic properties of our MRI-compatible actuator with several experiments, both inside and outside an MRI scanner. The reported results confirm the feasibility to use this motor for MRI-guided robotic interventions.

翻译：本文介绍一种新的非磁力驱动器用于磁共振动干预。超声波和压电动电机是磁共振动器中最常用的驱动器之一,然而,这些驱动器大多只有磁共振动器安全,这意味着它们无法在产生重要视觉文物的成像中操作。为了解决这一问题,我们开发了一个新的气动旋转旋转机(以Tesla涡轮为基础),可以在连续的磁共振成像中有效使用。我们用磁共振成像仪扫描仪内外的若干实验,彻底测试了与磁共振动器兼容的性能和磁性。所报告的结果证实了使用该发动机进行磁共振动器制导机器人干预的可行性。