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Measurements of the switched gradient magnetic field in MRI : A closer look at some unintuitive spatial characteristics

Frankel, Jennifer ; Mild, Kjell Hansson ; Olsrud, Johan LU ; Garpebring, Anders and Wilén, Jonna (2023) In iRADIOLOGY 1(4). p.390-396
Abstract

Concomitant fields are the unwanted transverse components that arise when spatial encoding gradients are applied in MRI. We measured the changing gradient magnetic field at multiple locations inside the scanner and examined the internal distribution and linearity of the three vector components of the field. Our results illustrate some not-so-obvious spatial characteristics of the gradient field, which can seem unintuitive at first glance, but are quite reasonable when considering electromagnetic theory and MRI-scanner physics constraints.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
concomitant fields, exposure assessment, measurement, spatial-encoding gradients, transverse magnetic field
in
iRADIOLOGY
volume
1
issue
4
pages
7 pages
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:85201059944
ISSN
2834-2860
DOI
10.1002/ird3.41
language
English
LU publication?
yes
id
02d52586-3962-4cd3-9882-0446bc96cbe0
date added to LUP
2024-12-12 12:41:32
date last changed
2025-04-17 22:43:40
@article{02d52586-3962-4cd3-9882-0446bc96cbe0,
  abstract     = {{<p>Concomitant fields are the unwanted transverse components that arise when spatial encoding gradients are applied in MRI. We measured the changing gradient magnetic field at multiple locations inside the scanner and examined the internal distribution and linearity of the three vector components of the field. Our results illustrate some not-so-obvious spatial characteristics of the gradient field, which can seem unintuitive at first glance, but are quite reasonable when considering electromagnetic theory and MRI-scanner physics constraints.</p>}},
  author       = {{Frankel, Jennifer and Mild, Kjell Hansson and Olsrud, Johan and Garpebring, Anders and Wilén, Jonna}},
  issn         = {{2834-2860}},
  keywords     = {{concomitant fields; exposure assessment; measurement; spatial-encoding gradients; transverse magnetic field}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{390--396}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{iRADIOLOGY}},
  title        = {{Measurements of the switched gradient magnetic field in MRI : A closer look at some unintuitive spatial characteristics}},
  url          = {{http://dx.doi.org/10.1002/ird3.41}},
  doi          = {{10.1002/ird3.41}},
  volume       = {{1}},
  year         = {{2023}},
}