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Related Concept Videos

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
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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Related Experiment Video

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Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
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Published on: December 18, 2016

A technique for rapid single-echo spin-echo T2 mapping.

Marshall S Sussman1, Logi Vidarsson, John M Pauly

  • 1Medical Imaging, University Health Network, Toronto, Ontario, Canada.

Magnetic Resonance in Medicine
|July 29, 2010
PubMed
Summary
This summary is machine-generated.

A new rapid technique accelerates T(2) relaxation time mapping using a modified spin echo approach. This method enhances imaging speed without compromising accuracy, making it suitable for clinical applications.

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Area of Science:

  • Magnetic Resonance Imaging
  • Biomedical Engineering

Background:

  • T(2) relaxation time mapping is crucial for various clinical applications.
  • Conventional methods are often time-consuming, limiting their clinical utility.
  • Existing techniques face challenges with T(1) relaxation time constraints.

Purpose of the Study:

  • To present a rapid technique for T(2) relaxation time mapping.
  • To overcome the limitations of conventional pulse repetition time requirements.
  • To enable faster and more efficient MRI data acquisition.

Main Methods:

  • Utilizes a single-echo spin echo approach with a significantly shorter pulse repetition time.
  • Employs a constant difference between echo time and pulse repetition time.
  • Theoretical, simulation, and phantom/in vivo validation studies were conducted.

Main Results:

  • Achieved T(2) measurements within 1% error under the criterion pulse repetition time/T(2) >= 3.
  • Demonstrated minimal impact from violations of the echo time/T(1) << 1 condition in most clinical scenarios.
  • Successfully validated in phantoms and in vivo for cartilage and brain imaging.

Conclusions:

  • The proposed method significantly reduces acquisition time for T(2) mapping.
  • It retains the advantages of conventional single-echo spin echo imaging.
  • The technique is robust, accurate, and readily implementable on clinical scanners.