Retrospective removal of k-space artifacts for echo-planar images: Noise reduction algorithms for spike suppression

Roderick W. McColl; Geoffrey D. Clarke; Ronald M. Peshock

doi:10.1117/12.317085

Retrospective removal of k-space artifacts for echo-planar images: Noise reduction algorithms for spike suppression

Roderick W. McColl, Geoffrey D. Clarke, Ronald M. Peshock

Department of Radiology

Research output: Contribution to journal › Conference article › peer-review

Abstract

High demands are made of the gradient systems of MRI scanners during acquisition of echo-planar images. These may occasionally lead to spurious noise added to the received data in the form of short duration, high intensity "spikes." If these spikes are not caught prior to image formation, a severely degraded image may be formed. In the acquisition of functional MRI data this degradation may prohibit subsequent analysis of the data for identification of activated brain regions. We have devised several algorithms to isolate and remove these spurious spikes prior to the Fourier transform, and in one example show that subsequent fMRI analyses are possible. By contrast, the analysis is either impossible or produces differing results without this processing step.

Original language	English (US)
Pages (from-to)	783-792
Number of pages	10
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	3336
DOIs	https://doi.org/10.1117/12.317085
State	Published - 1998
Event	Medical Imaging 1998: Physics of Medical Imaging - San Diego, CA, United States Duration: Feb 22 1998 → Feb 24 1998

Keywords

Artifact
Echo-planar imaging
Functional magnetic resonance imaging
Suppression
k-space

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.317085

Cite this

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title = "Retrospective removal of k-space artifacts for echo-planar images: Noise reduction algorithms for spike suppression",

abstract = "High demands are made of the gradient systems of MRI scanners during acquisition of echo-planar images. These may occasionally lead to spurious noise added to the received data in the form of short duration, high intensity {"}spikes.{"} If these spikes are not caught prior to image formation, a severely degraded image may be formed. In the acquisition of functional MRI data this degradation may prohibit subsequent analysis of the data for identification of activated brain regions. We have devised several algorithms to isolate and remove these spurious spikes prior to the Fourier transform, and in one example show that subsequent fMRI analyses are possible. By contrast, the analysis is either impossible or produces differing results without this processing step.",

keywords = "Artifact, Echo-planar imaging, Functional magnetic resonance imaging, Suppression, k-space",

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year = "1998",

doi = "10.1117/12.317085",

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volume = "3336",

pages = "783--792",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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note = "Medical Imaging 1998: Physics of Medical Imaging ; Conference date: 22-02-1998 Through 24-02-1998",

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TY - JOUR

T1 - Retrospective removal of k-space artifacts for echo-planar images

T2 - Medical Imaging 1998: Physics of Medical Imaging

AU - McColl, Roderick W.

AU - Clarke, Geoffrey D.

AU - Peshock, Ronald M.

PY - 1998

Y1 - 1998

N2 - High demands are made of the gradient systems of MRI scanners during acquisition of echo-planar images. These may occasionally lead to spurious noise added to the received data in the form of short duration, high intensity "spikes." If these spikes are not caught prior to image formation, a severely degraded image may be formed. In the acquisition of functional MRI data this degradation may prohibit subsequent analysis of the data for identification of activated brain regions. We have devised several algorithms to isolate and remove these spurious spikes prior to the Fourier transform, and in one example show that subsequent fMRI analyses are possible. By contrast, the analysis is either impossible or produces differing results without this processing step.

AB - High demands are made of the gradient systems of MRI scanners during acquisition of echo-planar images. These may occasionally lead to spurious noise added to the received data in the form of short duration, high intensity "spikes." If these spikes are not caught prior to image formation, a severely degraded image may be formed. In the acquisition of functional MRI data this degradation may prohibit subsequent analysis of the data for identification of activated brain regions. We have devised several algorithms to isolate and remove these spurious spikes prior to the Fourier transform, and in one example show that subsequent fMRI analyses are possible. By contrast, the analysis is either impossible or produces differing results without this processing step.

KW - Artifact

KW - Echo-planar imaging

KW - Functional magnetic resonance imaging

KW - Suppression

KW - k-space

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DO - 10.1117/12.317085

M3 - Conference article

AN - SCOPUS:0032401660

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EP - 792

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

Y2 - 22 February 1998 through 24 February 1998

ER -

Retrospective removal of k-space artifacts for echo-planar images: Noise reduction algorithms for spike suppression

Abstract

Keywords

ASJC Scopus subject areas

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