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Related Experiment Video

Updated: May 13, 2026

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Published on: December 18, 2016

Fast, variable system delay correction for spiral MRI.

Payal S Bhavsar¹, Nicholas R Zwart, James G Pipe

¹Keller Center for Imaging Innovation, Barrow Neurological Institute, Phoenix, Arizona, USA.

Magnetic Resonance in Medicine

|March 20, 2013

Summary

This summary is machine-generated.

A new method estimates system delays in spiral MRI, improving image quality by accounting for eddy currents and gradient coupling. This technique requires no special hardware or phantom scans.

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Area of Science:

Medical Imaging
Magnetic Resonance Imaging (MRI)

Background:

Time-varying system delays and eddy currents degrade spiral MRI image quality.
Accurate system delay estimation is crucial for high-fidelity imaging.

Purpose of the Study:

To propose a novel method for estimating variable system delays in spiral MRI.
To improve image quality affected by time-varying delays and eddy currents.

Main Methods:

A modified stack-of-spirals sequence was used.
Data were acquired from three overlapping orthogonal cylinders.
The method analyzes acquired data to estimate delays.

Main Results:

Initial results demonstrated the method's feasibility on phantom and in vivo data.
Synthesized phantom data were used for evaluation.

Conclusions:

The proposed method effectively estimates continuous delays for each gradient channel.
It accounts for gradient coupling effects and is robust to off-resonance.
No phantom measurements or specialized hardware are required.