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Assessment of the limiting spatial resolution of an MRI scanner by direct analysis of the edge spread function

Delakis, Ioannis; Xanthis, Christos LU and Kitney, Richard Ian (2009) In Medical Physics 36(5). p.1637-1642
Abstract
Limiting spatial resolution is a key metric of the quality of magnetic resonance MR images, which can provide an indication of the smallest region that can effectively be imaged. In this paper a novel methodology for measuring the limiting spatial resolution of MR images is mathematically analyzed and successfully implemented on phantom images. The methodology presented in this paper is based on a direct fit of a mathematical expression of the edge spread function (ESF) profile to the ESF data acquired at the interface between different materials. The mathematical expression of ESF was determined by approximating the line spread function (LSF) of the system with a sinc function.
The proposed methodology can be applied using signal data... (More)
Limiting spatial resolution is a key metric of the quality of magnetic resonance MR images, which can provide an indication of the smallest region that can effectively be imaged. In this paper a novel methodology for measuring the limiting spatial resolution of MR images is mathematically analyzed and successfully implemented on phantom images. The methodology presented in this paper is based on a direct fit of a mathematical expression of the edge spread function (ESF) profile to the ESF data acquired at the interface between different materials. The mathematical expression of ESF was determined by approximating the line spread function (LSF) of the system with a sinc function.
The proposed methodology can be applied using signal data from magnitude MRI spin echo images and is not sensitive to noise amplification introduced by differentiating the ESF to produce the LSF, as performed in previous studies. In addition, the proposed methodology provides a quantitative, representative measurement of the limiting spatial resolution of MR images. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
magnetic resonance imaging (MRI), spatial resolution, edge spread function
in
Medical Physics
volume
36
issue
5
pages
1637 - 1642
publisher
American Association of Physicists in Medicine
external identifiers
  • scopus:65449155510
  • pmid:19544780
ISSN
0094-2405
DOI
10.1118/1.3097633
language
English
LU publication?
no
id
be7be336-4712-4190-890d-f66c3ab83417
date added to LUP
2019-05-14 09:56:52
date last changed
2019-05-21 15:24:04
@article{be7be336-4712-4190-890d-f66c3ab83417,
  abstract     = {Limiting spatial resolution is a key metric of the quality of magnetic resonance MR images, which can provide an indication of the smallest region that can effectively be imaged. In this paper a novel methodology for measuring the limiting spatial resolution of MR images is mathematically analyzed and successfully implemented on phantom images. The methodology presented in this paper is based on a direct fit of a mathematical expression of the edge spread function (ESF) profile to the ESF data acquired at the interface between different materials. The mathematical expression of ESF was determined by approximating the line spread function (LSF) of the system with a sinc function.<br/>The proposed methodology can be applied using signal data from magnitude MRI spin echo images and is not sensitive to noise amplification introduced by differentiating the ESF to produce the LSF, as performed in previous studies. In addition, the proposed methodology provides a quantitative, representative measurement of the limiting spatial resolution of MR images.},
  author       = {Delakis, Ioannis and Xanthis, Christos and Kitney, Richard Ian},
  issn         = {0094-2405},
  keyword      = {magnetic resonance imaging (MRI),spatial resolution,edge spread function},
  language     = {eng},
  number       = {5},
  pages        = {1637--1642},
  publisher    = {American Association of Physicists in Medicine},
  series       = {Medical Physics},
  title        = {Assessment of the limiting spatial resolution of an MRI scanner by direct analysis of the edge spread function},
  url          = {http://dx.doi.org/10.1118/1.3097633},
  volume       = {36},
  year         = {2009},
}