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The Measurement and Treatment of Suppression in Amblyopia

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Published on: December 14, 2012

Aliasing artifacts with the BLADE technique: causes and effective suppression.

Shinya Kojima¹, Satoru Morita, Eiko Ueno

¹Department of Radiology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan. yancy123xyz@nifty.com

Journal of Magnetic Resonance Imaging : JMRI

|January 29, 2011

Summary

This summary is machine-generated.

Aliasing artifacts in BLADE imaging stem from within and outside the field-of-view (FOV). Effective suppression is achieved using 25% phase oversampling (POS) and presaturation pulses (SAT) outside the FOV.

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Area of Science:

Medical Imaging
Radiology
Magnetic Resonance Imaging

Background:

Aliasing artifacts are a common issue in advanced MRI techniques.
The BLADE (Blade-like Acquisition by Interleaved EPI) technique is susceptible to these artifacts.
Understanding artifact origins is crucial for image quality improvement.

Purpose of the Study:

To identify the sources of aliasing artifacts in BLADE imaging.
To evaluate methods for suppressing these artifacts.
To optimize BLADE imaging parameters for clearer results.

Main Methods:

Phantom studies were conducted to observe aliasing artifacts from internal and external FOV features.
The efficacy of phase oversampling (POS) and presaturation pulses (SAT) for artifact suppression was assessed.
Findings were validated in a healthy volunteer study.

Main Results:

Aliasing artifacts were confirmed to originate from both inside and outside the FOV.
A 25% POS effectively suppressed artifacts from within the FOV, balancing image quality and acquisition time.
SAT applied outside the FOV significantly reduced external artifacts without unnecessary coil selection.

Conclusions:

BLADE aliasing artifacts arise from both internal and external FOV sources.
A combination of 25% POS and external SAT provides comprehensive artifact suppression.
This combined approach enhances image clarity in BLADE MRI examinations.