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MR image artifacts from periodic motion.

M L Wood, R M Henkelman

Medical Physics

|March 1, 1985

Summary

This summary is machine-generated.

Periodic motion during magnetic resonance (MR) imaging causes image artifacts like blurring and ghosting. This study demonstrates how mechanical oscillation and computer simulations reveal these motion-induced distortions in MR images.

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Area of Science:

Medical Imaging
Physics

Background:

Periodic motion during image acquisition can degrade Magnetic Resonance (MR) image quality.
Understanding these artifacts is crucial for accurate diagnostic interpretation.

Purpose of the Study:

To investigate and characterize artifacts caused by periodic motion in MR imaging.
To correlate experimental findings with computer simulations.

Main Methods:

A mechanical device was used to oscillate a sample within a 0.15-T MR imager.
Two- and three-dimensional MR images were acquired at various oscillation frequencies and amplitudes.
Computer simulations were performed to model the effects of motion on image acquisition.

Main Results:

Related Experiment Videos

Experimental results showed that motion causes local blurring in MR images.

Ghost artifacts were observed along the phase-encoding directions, consistent with Fourier transform imaging principles.

Computer simulations accurately reproduced the experimentally observed motion artifacts.

Conclusions:

Periodic motion is a significant source of artifacts in MR imaging.
The study confirms that motion-induced blurring and ghosting are predictable phenomena.
This work provides a foundation for developing motion correction strategies in MR imaging.