Noise and filtration in magnetic resonance imaging

E. R. Mcveigh; R. M. Henkelman; M. J. Bronskill

doi:10.1118/1.595679

Noise and filtration in magnetic resonance imaging

E. R. Mcveigh, R. M. Henkelman, M. J. Bronskill

Research output: Contribution to journal › Article › peer-review

160 Scopus citations

Abstract

Noise in two dimensional Fourier transform magnetic resonance images has been investigated using noise power spectra and measurements of standard deviation. The measured effects of averaging, spatial filtering, temporal filtering, and sampling have been compared with theoretical calculations. The noise of unfiltered images is found to be white, as expected, and the choice of the temporal filter and sampling interval affects the noise in a manner predicted by sampling theory. The shapes of the imager's spatial frequency filters are extracted using noise power spectra.

Original language	English (US)
Pages (from-to)	586-591
Number of pages	6
Journal	Medical Physics
Volume	12
Issue number	5
DOIs	https://doi.org/10.1118/1.595679
State	Published - 1985
Externally published	Yes

Keywords

BIOMEDICAL RADIOGRAPHY
DIAGNOSTIC TECHNIQUES
FILTRATION
IMAGE PROCESSING
IMAGES
NOISE
NUCLEAR MAGNETIC RESONANCE

ASJC Scopus subject areas

Biophysics
Radiology Nuclear Medicine and imaging

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abstract = "Noise in two dimensional Fourier transform magnetic resonance images has been investigated using noise power spectra and measurements of standard deviation. The measured effects of averaging, spatial filtering, temporal filtering, and sampling have been compared with theoretical calculations. The noise of unfiltered images is found to be white, as expected, and the choice of the temporal filter and sampling interval affects the noise in a manner predicted by sampling theory. The shapes of the imager's spatial frequency filters are extracted using noise power spectra.",

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author = "Mcveigh, {E. R.} and Henkelman, {R. M.} and Bronskill, {M. J.}",

year = "1985",

doi = "10.1118/1.595679",

language = "English (US)",

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pages = "586--591",

journal = "Medical Physics",

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AU - Mcveigh, E. R.

AU - Henkelman, R. M.

AU - Bronskill, M. J.

PY - 1985

Y1 - 1985

N2 - Noise in two dimensional Fourier transform magnetic resonance images has been investigated using noise power spectra and measurements of standard deviation. The measured effects of averaging, spatial filtering, temporal filtering, and sampling have been compared with theoretical calculations. The noise of unfiltered images is found to be white, as expected, and the choice of the temporal filter and sampling interval affects the noise in a manner predicted by sampling theory. The shapes of the imager's spatial frequency filters are extracted using noise power spectra.

AB - Noise in two dimensional Fourier transform magnetic resonance images has been investigated using noise power spectra and measurements of standard deviation. The measured effects of averaging, spatial filtering, temporal filtering, and sampling have been compared with theoretical calculations. The noise of unfiltered images is found to be white, as expected, and the choice of the temporal filter and sampling interval affects the noise in a manner predicted by sampling theory. The shapes of the imager's spatial frequency filters are extracted using noise power spectra.

KW - BIOMEDICAL RADIOGRAPHY

KW - DIAGNOSTIC TECHNIQUES

KW - FILTRATION

KW - IMAGE PROCESSING

KW - IMAGES

KW - NOISE

KW - NUCLEAR MAGNETIC RESONANCE

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JO - Medical Physics

JF - Medical Physics

IS - 5

ER -

Noise and filtration in magnetic resonance imaging

Abstract

Keywords

ASJC Scopus subject areas

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