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Related Experiment Videos

Abdomen: diffusion-weighted MR imaging with pulse-triggered single-shot sequences.

Petra Mürtz1, Sebastian Flacke, Frank Träber

  • 1Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, D-53105 Bonn, Germany. muertz@uni-bonn.de

Radiology
|July 2, 2002
PubMed
Summary

Pulse triggering in magnetic resonance (MR) imaging significantly reduces motion artifacts. This technique improves the accuracy and reproducibility of apparent diffusion coefficient (ADC) measurements in abdominal organs.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Biophysics

Background:

  • Magnetic resonance (MR) diffusion imaging is a valuable tool for assessing tissue microstructure.
  • Motion artifacts, particularly from cardiac and respiratory motion, can degrade image quality and affect quantitative measurements in abdominal MR diffusion imaging.
  • Apparent diffusion coefficients (ADCs) provide quantitative information about water diffusion, reflecting tissue properties.

Purpose of the Study:

  • To evaluate the impact of pulse triggering on the quality and quantitative accuracy of abdominal MR diffusion measurements.
  • To compare diffusion-weighted images acquired with and without pulse triggering.
  • To assess the effect of different trigger delays on measurement reproducibility.

Main Methods:

  • Diffusion-weighted single-shot MR imaging sequences were employed in 12 healthy volunteers.

Related Experiment Videos

  • Measurements were performed both with and without cardiac pulse triggering.
  • Various trigger delays relative to the cardiac cycle (diastolic phase) were investigated.

    • Main Results:

    • Pulse triggering to the diastolic phase significantly reduced motion artifacts in diffusion-weighted MR images.
    • Image quality and the accuracy of ADC measurements for abdominal organs were substantially improved with pulse triggering.
    • The reproducibility of ADC measurements was also significantly enhanced by using pulse triggering.

    Conclusions:

    • Cardiac pulse triggering is an effective method for minimizing motion artifacts in abdominal MR diffusion imaging.
    • Implementing pulse triggering improves the reliability and accuracy of quantitative ADC measurements, enhancing diagnostic potential.
    • This technique is crucial for robust abdominal diffusion MRI analysis.