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Transmit SENSE.

Ulrich Katscher1, Peter Börnert, Christoph Leussler

  • 1Philips Research Laboratories, Hamburg, Germany. Ulrich.Katscher@philips.com

Magnetic Resonance in Medicine
|January 2, 2003
PubMed
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Parallel transmission, a novel MRI technique, shortens radiofrequency (RF) pulse duration by using multiple transmit coils. This "Transmit SENSE" method maintains spatial accuracy, enabling faster 3D imaging.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Radiofrequency (RF) Pulse Design
  • Parallel Imaging Techniques

Background:

  • Parallel imaging accelerates MRI acquisition by using multiple receiver coils.
  • Multidimensional RF pulses are crucial for spatial selectivity but can be lengthy.
  • Shortening RF pulse duration is essential for advanced imaging applications.

Purpose of the Study:

  • To adapt parallel imaging principles for RF pulse transmission.
  • To introduce and validate a method for parallel transmission called "Transmit SENSE".
  • To reduce the duration of spatially-selective multidimensional RF pulses.

Main Methods:

  • Conceptually adapted parallel imaging from reception to transmission.
  • Developed "Transmit SENSE" for parallel transmission using arbitrarily shaped coils.

Related Experiment Videos

  • Performed numerical simulations to assess theoretical feasibility.
  • Conducted experimental proof of principle on a commercial MRI scanner, combining subexperiments due to hardware limitations.

    • Main Results:

    • Demonstrated the theoretical feasibility of parallel transmission via numerical studies.
    • Provided experimental validation of the Transmit SENSE concept.
    • Showcased that parallel transmission can maintain spatial pulse profile definition while reducing duration.
    • Successfully compensated for k-space trajectory shortening using multiple transmit coils.

    Conclusions:

    • Parallel transmission, or Transmit SENSE, is a feasible technique for shortening multidimensional RF pulses.
    • This method can enable 3D RF pulses for challenging imaging scenarios like fast T(2)(*) decay or field inhomogeneities.
    • Transmit SENSE offers potential for improved spatial resolution without increasing RF pulse duration.