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Phase contrast MR angiography techniques

C L Dumoulin¹

¹General Electric Research and Development Center, Schenectady, New York, USA.

Magnetic Resonance Imaging Clinics of North America

|August 1, 1995

Summary

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Phase contrast MRI quantifies blood flow velocity by analyzing MR signal phase, offering superior stationary tissue suppression. This technique directly measures flow, overcoming limitations of other methods for diverse applications.

Area of Science:

Medical Imaging
Biophysics
Cardiovascular Science

Background:

Phase contrast Magnetic Resonance (MR) methods leverage MR signal phase to detect macroscopic motion.
These techniques are crucial for quantitative flow assessment in various medical imaging scenarios.

Purpose of the Study:

To elucidate the principles and applications of phase contrast MR methods.
To highlight the advantages of phase contrast MR over other techniques like time-of-flight for flow imaging.

Main Methods:

Utilizing phase information in MR signals to encode velocity.
Applying methods across various fields-of-view (small to large).
Implementing techniques for quantitative velocity measurements and stationary tissue suppression.

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Main Results:

Phase contrast MR provides quantitative velocity measurements.
Achieves excellent suppression of signals from stationary tissues.
Directly measures blood flow, avoiding artifacts associated with short T1 tissues.

Conclusions:

Phase contrast MR is a versatile tool for quantitative flow imaging.
Its ability to directly measure flow and suppress stationary tissue makes it valuable for applications throughout the body.
Phase contrast angiograms can be generated in 2D, 3D, and time-resolved formats.