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Related Experiment Video

Updated: Jul 9, 2026

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Published on: April 11, 2025

Automatic correction of echo-planar imaging (EPI) ghosting artifacts in real-time interactive cardiac MRI using

Yoon-Chul Kim¹, Jon-Fredrik Nielsen, Krishna S Nayak

¹Magnetic Resonance Engineering Laboratory, Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, California, USA. yoonckim@usc.edu

Journal of Magnetic Resonance Imaging : JMRI

|December 1, 2007

Summary

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Imaging Studies for Cardiovascular System IV: CMRI

Imaging Studies for Cardiovascular System IV: CMRI

Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...

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A new method automatically corrects echo-misalignment ghosting artifacts in gradient-echo echo-planar imaging (EPI) across all scan planes. This technique offers superior ghost suppression compared to conventional methods, enabling real-time imaging applications.

Area of Science:

Magnetic Resonance Imaging
Image Reconstruction
Artifact Correction

Background:

Echo-planar imaging (EPI) is susceptible to ghosting artifacts caused by echo-misalignment.
These artifacts are particularly problematic in arbitrary oblique or double-oblique scan planes.
Accurate artifact correction is crucial for reliable EPI data interpretation.

Purpose of the Study:

To develop an automated method for correcting ghosting artifacts in interleaved gradient-echo EPI.
The method aims to function effectively in arbitrary oblique or double-oblique scan planes.
To compare the proposed method against conventional techniques.

Main Methods:

Developed an automatic ghosting correction technique using alternating EPI acquisition and phased-array ghost elimination (PAGE) reconstruction.

Related Experiment Videos

Last Updated: Jul 9, 2026

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Published on: April 11, 2025

Alternated k-space traversal direction per temporal frame for dynamic estimation of ghost-free coil sensitivity maps.

Evaluated the method in phantom and in vivo cardiac studies, comparing it with 1D phase correction across various scan planes.

Main Results:

The proposed method achieved excellent ghost artifact suppression in all tested scan planes without acceleration.
Demonstrated significantly greater effectiveness than conventional 1D phase correction, especially in oblique and double-oblique planes.
Showcased real-time reconstruction feasibility with 3.1-mm spatial and 60-ms temporal resolution.

Conclusions:

The developed technique provides robust ghost suppression in arbitrary scan orientations without requiring calibration scans.
The method is highly effective for real-time interactive imaging scenarios involving frequent changes in arbitrary oblique orientations.
This advancement improves the utility of EPI in complex anatomical imaging and dynamic studies.