Abstract #0736

Real-Time MRI-Guided Targeted Needle Placement During Motion using Rolling-Diaphragm Hydrostatic Actuators

Samantha Mikaiel^1,2, James Simonelli³, Yu-Hsiu Lee³, Xinzhou Li^1,4, Yong Seok Lee^1,5, David Lu¹, Kyunghyun Sung^1,2,4, Tsu-Chin Tsao³, and Holden H Wu^1,2,4

¹Radiological Sciences, University of California Los Angeles, Los Angeles, CA, United States, ²Biomedical Physics, 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, Korea, Republic of

In this work, we present a new version of our hydrostatically actuated system and investigate its accuracy and time efficiency for real-time MRI-guided targeted needle placement in a motion phantom. We show that actuator-assisted needle placement was able to reach the targets with greater accuracy and in less time than free-hand step-and-shoot placement for both static and simulated respiration motion. Our new rolling-diaphragm hydrostatic actuators can potentially enable physicians to remotely perform real-time MRI-guided interventions during motion.

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