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Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
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Device localization and dynamic scan plane selection using a wireless magnetic resonance imaging detector array.

Matthew J Riffe1, Stephen R Yutzy, Yun Jiang

  • 1Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA.

Magnetic Resonance in Medicine
|August 1, 2013
PubMed
Summary
This summary is machine-generated.

A prototype wireless device for magnetic resonance imaging guidance was developed. This system enables precise localization and scan plane definition for improved image-guided procedures.

Keywords:
magnetic resonance imagingmicrocoil trackingsingle sideband amplitude modulationwireless link

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Wireless Technology

Background:

  • Image-guided procedures require accurate device localization.
  • Existing methods may have limitations in real-time tracking.
  • Wireless solutions offer potential for enhanced maneuverability and integration.

Purpose of the Study:

  • To present a prototype wireless guidance device for a 1.5T magnetic resonance imaging (MRI) system.
  • To demonstrate the feasibility of active tracking using a wireless detector array.

Main Methods:

  • A wireless device with three fiducial markers and independent receiver coils using single sideband amplitude modulation (SSB) was developed.
  • Device position and orientation were determined by orthogonal projections of fiducial markers.
  • Localization and scan plane updates were achieved in approximately 30 ms, allowing interleaving with high temporal resolution imaging.

Main Results:

  • The wireless device achieved localization and scan plane definition with sub-pixel accuracy (<0.78 mm error) even with an asynchronous clock.
  • Successful image guidance was demonstrated in a phantom study, guiding a needle to a target and delivering contrast.

Conclusions:

  • The feasibility of active tracking with a wireless detector array for MRI-guided interventions is demonstrated.
  • Wireless arrays can be integrated into devices to enhance image-guided procedures.