Abstract #4163

Accuracy and Time Efficiency of Real-Time MRI-Guided Remote-Controlled Targeted Needle Placement During Motion Using Hydrostatic Actuators

Samantha Mikaiel^1,2, James Simonelli³, Xinzhou Li^1,4, Yu-Hsiu Lee³, Yong Seok Lee⁵, Kyunghyun Sung^1,2,4, David Lu¹, Tsu-Chin Tsao³, and Holden H Wu^1,2,4

¹Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, United States, ²Physics and Biology in Medicine, University of California, Los Angeles, Los Angeles, CA, United States, ³Mechanical and Aerospace Engineering, University of California, Los Angeles, Los Angeles, CA, United States, ⁴Bioengineering, University of California, Los Angeles, Los Angeles, CA, United States, ⁵Department of Radiology, Dongguk University Ilsan Hospital, Goyang, Korea, Democratic People's Republic of

In this work, we investigate the accuracy and time efficiency for real-time MRI-guided targeted needle placement using a rolling-diaphragm hydrostatic actuator system during motion. We show that the actuator-assisted approach was able to guide the needle to targets with greater accuracy and in less time than the conventional step-and-shoot strategy for both static and dynamic conditions using a programmable motion phantom. The new actuator system can potentially enable physicians to remotely perform real-time MRI-guided interventions during motion.

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