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Related Concept Videos

Magnetic Resonance Imaging01:24

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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MRI-guided targeted needle placement during motion using hydrostatic actuators.

Samantha Mikaiel1,2, James Simonelli3, Xinzhou Li1,4

  • 1Department of Radiological Sciences, University of California Los Angeles, Los Angeles, California.

The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS
|November 2, 2019
PubMed
Summary
This summary is machine-generated.

A new hydrostatic actuator system improves MRI-guided needle placement accuracy and speed. This remote-controlled device shows promise for enhancing targeted interventions in moving targets.

Keywords:
Actuator systemsImage-guided interventionsInterventional MRITargeted needle placement

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Area of Science:

  • Medical Imaging
  • Interventional Radiology
  • Robotics in Medicine

Background:

  • Magnetic resonance imaging (MRI) offers unique benefits for guiding medical interventions.
  • Navigating confined spaces during MRI-guided procedures presents a significant challenge.
  • This study investigates a novel remote-controlled hydrostatic actuator system to address these limitations.

Purpose of the Study:

  • To evaluate the feasibility of a hydrostatic actuator system for MRI-guided targeted needle placement.
  • To assess the system's impact on MR image quality.
  • To compare the accuracy and efficiency of the actuator-assisted method against a conventional approach.

Main Methods:

  • The study assessed the hydrostatic actuator system's effect on MR image quality.
  • Two operators performed MRI-guided needle placement in 12 targets within a motion phantom.
  • Comparisons were made between a reference step-and-shoot (SS) method and the proposed actuator-assisted (AA) method.

Main Results:

  • The hydrostatic actuator system demonstrated a negligible impact on MR image quality.
  • The actuator-assisted method (AA) showed significantly higher accuracy and precision in dynamic targets compared to the step-and-shoot (SS) method.
  • AA reduced needle insertion time by 50-80% and total procedure time by 25%.

Conclusions:

  • The developed hydrostatic actuator system shows potential for enhancing accuracy in MRI-guided needle placement.
  • The system may significantly reduce procedure times, particularly in the presence of target motion.
  • This technology could improve the efficiency and effectiveness of interventional procedures guided by MRI.