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Related Experiment Videos

Two-dimensional coronary MRA: limitations and artifacts

A J Duerinckx1, D P Atkinson, J Mintorovitch

  • 1Radiology Service, MRI, VA Medical Center, West Los Angeles, CA 90073, USA.

European Radiology
|January 1, 1996
PubMed
Summary
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Two-dimensional coronary MR angiography (MRA) shows image quality issues like ghosting and blurring. These problems, along with interpretation challenges, must be resolved before widespread clinical use of coronary MRA.

Area of Science:

  • Cardiovascular Imaging
  • Magnetic Resonance Imaging

Background:

  • Two-dimensional coronary MR angiography (MRA) is an emerging technique for visualizing coronary arteries.
  • Assessing the diagnostic quality and potential limitations of 2D coronary MRA is crucial for its clinical adoption.

Purpose of the Study:

  • To evaluate the image quality and interpretation challenges associated with two-dimensional coronary MR angiography.
  • To identify specific artifacts and interpretive difficulties encountered during 2D coronary MRA examinations.

Main Methods:

  • 27 subjects (12 healthy, 15 patients) underwent 2D coronary MRA using a 1.5-T imager.
  • A fat-suppressed, electrocardiographically gated, breath-hold gradient-echo sequence with k-space segmentation was employed.
  • Image quality and interpretive issues were systematically assessed.

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Main Results:

  • Common image quality degradations included ghosting (22%), blurring (22%), and incomplete fat-suppression (19%).
  • Breath-holding difficulties affected 44% of subjects, leading to misregistration in 37% of optimal quality images.
  • Interpretive challenges included distinguishing veins from arteries (37%) and poor visualization of the left main coronary artery (59%).

Conclusions:

  • Two-dimensional coronary MRA exhibits significant image quality and interpretation problems.
  • These limitations, including artifacts and anatomical visualization issues, require further technical development and validation.
  • Addressing these challenges is essential prior to the routine clinical implementation of 2D coronary MRA.