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Revolving Permanent Magnet for Magnetomotive Ultrasound

Sjostrand, Sandra LU ; Evertsson, Maria LU ; Lindquist, Ulrika; Lindkvist, Rebecka; Andresson, Roger; Wahlstrom, Anders; Nybom, Goran; Svensson, Ingrid LU ; Cinthio, Magnus LU and Jansson, Tomas LU (2018) 2018 IEEE International Ultrasonics Symposium, IUS 2018 2018-October.
Abstract

In magnetomotive ultrasound (MMUS), solenoids have been extensively used to generate varying magnetic fields, that act to move nanoparticles and their surrounding tissue. Here we show, compare and contrast two magnetic devices, one based on a solenoid, another containing a rotating permanent magnet. Suitable field characteristics for this application include high flux density and gradient, and uniform field laterally in the image plane, and the corresponding design features are highlighted. Field measurements show that both magnets generate suitable fields. The magnetic force potentially exerted by the permanent magnet even exceeds that of the solenoid up to a depth of 4 mm. Considering the substantial heat generation in high inductance... (More)

In magnetomotive ultrasound (MMUS), solenoids have been extensively used to generate varying magnetic fields, that act to move nanoparticles and their surrounding tissue. Here we show, compare and contrast two magnetic devices, one based on a solenoid, another containing a rotating permanent magnet. Suitable field characteristics for this application include high flux density and gradient, and uniform field laterally in the image plane, and the corresponding design features are highlighted. Field measurements show that both magnets generate suitable fields. The magnetic force potentially exerted by the permanent magnet even exceeds that of the solenoid up to a depth of 4 mm. Considering the substantial heat generation in high inductance electromagnets, a permanent magnet would be preferable as it eliminates the need for cooling. Thus, we suggest the use of permanent magnets in MMUS devices to reduce the size, while maintaining a high field and gradient required to move nanoparticles.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
field, magnetomotive, permanent magnet, ultrasound
host publication
2018 IEEE International Ultrasonics Symposium, IUS 2018
volume
2018-October
publisher
IEEE Computer Society
conference name
2018 IEEE International Ultrasonics Symposium, IUS 2018
conference location
Kobe, Japan
conference dates
2018-10-22 - 2018-10-25
external identifiers
  • scopus:85060626584
ISBN
9781538634257
DOI
10.1109/ULTSYM.2018.8580041
language
English
LU publication?
yes
id
38e938bb-263c-4c2f-8cb6-8dba2b8a2a8e
date added to LUP
2019-02-08 11:17:09
date last changed
2019-03-05 04:31:58
@inproceedings{38e938bb-263c-4c2f-8cb6-8dba2b8a2a8e,
  abstract     = {<p>In magnetomotive ultrasound (MMUS), solenoids have been extensively used to generate varying magnetic fields, that act to move nanoparticles and their surrounding tissue. Here we show, compare and contrast two magnetic devices, one based on a solenoid, another containing a rotating permanent magnet. Suitable field characteristics for this application include high flux density and gradient, and uniform field laterally in the image plane, and the corresponding design features are highlighted. Field measurements show that both magnets generate suitable fields. The magnetic force potentially exerted by the permanent magnet even exceeds that of the solenoid up to a depth of 4 mm. Considering the substantial heat generation in high inductance electromagnets, a permanent magnet would be preferable as it eliminates the need for cooling. Thus, we suggest the use of permanent magnets in MMUS devices to reduce the size, while maintaining a high field and gradient required to move nanoparticles.</p>},
  author       = {Sjostrand, Sandra and Evertsson, Maria and Lindquist, Ulrika and Lindkvist, Rebecka and Andresson, Roger and Wahlstrom, Anders and Nybom, Goran and Svensson, Ingrid and Cinthio, Magnus and Jansson, Tomas},
  isbn         = {9781538634257},
  keyword      = {field,magnetomotive,permanent magnet,ultrasound},
  language     = {eng},
  location     = {Kobe, Japan},
  month        = {12},
  publisher    = {IEEE Computer Society},
  title        = {Revolving Permanent Magnet for Magnetomotive Ultrasound},
  url          = {http://dx.doi.org/10.1109/ULTSYM.2018.8580041},
  volume       = {2018-October},
  year         = {2018},
}