Advanced

B-field energy dependent phase lag dispersion in magnetomotive ultrasound imaging

Andersson, Roger LU ; Cinthio, Magnus LU ; Evertsson, Maria LU ; Toftevall, Hanna; Wahlstrom, Anders; Fredriksson, Sarah; Nybom, Goran and Jansson, Tomas LU (2015) IEEE International Ultrasonics Symposium (IUS), 2015 In 2015 IEEE International Ultrasonics Symposium (IUS)
Abstract
Magnetomotive ultrasound imaging is an emerging technique where superparamagnetic iron oxide nanoparticles can be used as an ultrasound contrast agent. A time-varying external magnetic field acts to move tissue embedded particles, and ultrasound is used to detect the resulting tissue movement. In experimental phantom studies we have observed a phase lag dispersion in the magnetomotive response in respect to applied time-varying magnetic field (B-field). We hypothesize that this dispersion is triggered by the strength of the applied B-field in combination with concentration of embedded nanoparticles in the region. The cohort response of the nanoparticles aligns as the magnetic field gets more energetic. Moreover, the tightening of the phase... (More)
Magnetomotive ultrasound imaging is an emerging technique where superparamagnetic iron oxide nanoparticles can be used as an ultrasound contrast agent. A time-varying external magnetic field acts to move tissue embedded particles, and ultrasound is used to detect the resulting tissue movement. In experimental phantom studies we have observed a phase lag dispersion in the magnetomotive response in respect to applied time-varying magnetic field (B-field). We hypothesize that this dispersion is triggered by the strength of the applied B-field in combination with concentration of embedded nanoparticles in the region. The cohort response of the nanoparticles aligns as the magnetic field gets more energetic. Moreover, the tightening of the phase response indicate an asymptotic tapering towards a phase limit. (Less)
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
molecular imaging, contrast agents, superparamagnetic, iron oxide, nanoparticles
in
2015 IEEE International Ultrasonics Symposium (IUS)
pages
4 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE International Ultrasonics Symposium (IUS), 2015
external identifiers
  • wos:000366045700018
  • scopus:84962003814
ISSN
1948-5719
DOI
10.1109/ULTSYM.2015.0322
language
English
LU publication?
yes
id
35177c9d-5704-47ef-9bf8-13f3b0ae69d1 (old id 8560020)
date added to LUP
2016-01-29 11:51:11
date last changed
2017-01-01 06:09:06
@inproceedings{35177c9d-5704-47ef-9bf8-13f3b0ae69d1,
  abstract     = {Magnetomotive ultrasound imaging is an emerging technique where superparamagnetic iron oxide nanoparticles can be used as an ultrasound contrast agent. A time-varying external magnetic field acts to move tissue embedded particles, and ultrasound is used to detect the resulting tissue movement. In experimental phantom studies we have observed a phase lag dispersion in the magnetomotive response in respect to applied time-varying magnetic field (B-field). We hypothesize that this dispersion is triggered by the strength of the applied B-field in combination with concentration of embedded nanoparticles in the region. The cohort response of the nanoparticles aligns as the magnetic field gets more energetic. Moreover, the tightening of the phase response indicate an asymptotic tapering towards a phase limit.},
  author       = {Andersson, Roger and Cinthio, Magnus and Evertsson, Maria and Toftevall, Hanna and Wahlstrom, Anders and Fredriksson, Sarah and Nybom, Goran and Jansson, Tomas},
  booktitle    = {2015 IEEE International Ultrasonics Symposium (IUS)},
  issn         = {1948-5719},
  keyword      = {molecular imaging,contrast agents,superparamagnetic,iron oxide,nanoparticles},
  language     = {eng},
  pages        = {4},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {B-field energy dependent phase lag dispersion in magnetomotive ultrasound imaging},
  url          = {http://dx.doi.org/10.1109/ULTSYM.2015.0322},
  year         = {2015},
}