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Fast angiography using selective inversion recovery.

S J Wang1, D G Nishimura, A Macovski

  • 1Magnetic Resonance Systems Research Laboratory, Stanford University, California 94309.

Magnetic Resonance in Medicine
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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This study introduces a faster method for magnetic resonance angiography (MRA) using selective inversion recovery. The enhanced technique achieves high-resolution angiograms in just 15 seconds, reducing motion artifacts.

Area of Science:

  • Medical Imaging
  • Cardiovascular Imaging
  • Magnetic Resonance Imaging

Background:

  • Selective inversion recovery is a technique used in magnetic resonance imaging (MRI) for angiography.
  • Traditional methods can be time-consuming, leading to artifacts from patient motion.

Purpose of the Study:

  • To develop an enhanced selective inversion recovery technique for faster, high-resolution angiogram acquisition.
  • To reduce scan time and minimize motion-related artifacts in cardiovascular imaging.

Main Methods:

  • Implementing multiple read pulses after each tagging inversion pulse to acquire several phase encodes per cardiac cycle.
  • Utilizing an increasing flip-angle sequence for uniform signal weighting.
  • Employing a specialized phase encode ordering and postprocessing to minimize ghosting and signal nonuniformity.

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Main Results:

  • Achieved high-resolution angiograms in as little as 15 seconds.
  • Demonstrated significant reduction in artifacts caused by patient and respiratory motion.
  • Enabled uniform signal weighting and minimized ghosting artifacts.

Conclusions:

  • The enhanced selective inversion recovery technique offers a substantial reduction in scan time for high-resolution angiography.
  • This method is particularly beneficial for imaging vasculature in areas prone to respiratory motion.
  • The technique improves image quality and diagnostic utility by minimizing motion artifacts.