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Related Experiment Videos

MRI cardiac tagging using a sinc-modulated RF pulse train.

Ed X Wu1, Christopher W Towe, Haiying Tang

  • 1Department of Radiology, College of Physicians and Surgeons, Columbia University, New York, New York, USA. xew1@columbia.edu

Magnetic Resonance in Medicine
|September 5, 2002
PubMed
Summary

This study introduces a novel cardiac magnetic resonance imaging (MRI) tagging method using a sinc-modulated radiofrequency pulse train. This technique provides sharper tags and adjustable tag width for improved cardiac motion analysis.

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Biomedical Engineering
  • Cardiovascular Imaging

Background:

  • Cardiac tagging is crucial for assessing heart motion.
  • Existing techniques like DANTE and SPAMM have limitations in tag sharpness and flexibility.
  • Spatial modulation of magnetization is a key technique in MRI.

Purpose of the Study:

  • To develop an improved cardiac tagging method using RF pulse trains.
  • To achieve sharper tag edges and controllable tag dimensions.
  • To offer an alternative to existing cardiac tagging techniques.

Main Methods:

  • Utilized a sinc-modulated radiofrequency (RF) pulse train with a constant gradient.
  • Generated a rectangular profile of saturated magnetization.

Related Experiment Videos

  • Controlled tag width via the bandwidth of the sinc envelope.

    • Main Results:

    • Demonstrated sharper-edged tags compared to DANTE and SPAMM.
    • Showcased the ability to adjust the ratio of tag width to tag separation.
    • Successfully implemented and validated the method on phantom and in vivo mouse heart studies using a 9.4 T NMR system.

    Conclusions:

    • The novel sinc-modulated RF pulse train method enhances cardiac tagging.
    • This technique offers superior tag definition and adaptability for cardiac motion quantification.
    • The findings support its potential application in advanced cardiovascular MRI studies.