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Related Experiment Videos

Controlled eddy currents: applications to MR imaging.

J A Malko1, R C Nelson

  • 1Department of Radiology, Emory University School of Medicine, Atlanta, GA.

Journal of Computer Assisted Tomography
|November 1, 1987
PubMed
Summary
This summary is machine-generated.

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Eddy currents in copper coils can be controlled in magnetic resonance (MR) imaging to reduce signal intensity. This technique eliminates artifacts and reduces ghosting from subcutaneous fat in MR scans.

Area of Science:

  • Medical Imaging
  • Physics

Background:

  • Eddy currents are generated in conductive materials like copper coils within magnetic resonance (MR) imaging systems.
  • These eddy currents can distort the magnetic field, leading to artifacts in MR images.

Purpose of the Study:

  • To describe the control of eddy current artifacts in MR imaging.
  • To demonstrate the advantageous use of controlled eddy currents for artifact reduction and signal manipulation.

Main Methods:

  • Utilizing free-standing copper coils to generate and control eddy currents.
  • Applying coils to reduce signal intensity in adjacent tissues.
  • Implementing this technique to eliminate aliasing artifacts and reduce subcutaneous fat signal.

Main Results:

Related Experiment Videos

  • Demonstrated control over eddy currents generated in copper coils for MR imaging applications.
  • Successfully eliminated an aliasing artifact by suppressing the signal from an unwanted object.
  • Reduced high-intensity signals from subcutaneous fat and associated respiratory ghosting in abdominal MR scans.

Conclusions:

  • Controlled eddy currents in copper coils offer a method to mitigate artifacts in MR imaging.
  • This technique can be strategically employed to improve image quality by reducing unwanted signals and ghosting.