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R2-dispersion simulation of foam microstructure

Steven Baete UGent and Yves De Deene UGent (2008) AIP CONFERENCE PROCEEDINGS. 1081. p.83-86
abstract
The spin-spin relaxation rate R-2 (-1/T-2) in hydrogel foams measured by use of a multi spin echo sequence is found to be dependent on the echo time spacing. This property, referred to as R-2-dispersion, originates from both surface relaxation and molecular self-diffusion of water within internal field gradients that result from magnetic susceptibility differences between the gel and air phase. In hydrogel foams, correlations between the average air bubble size and R-2-values are found (S. Baete and Y. De Deene, Proc. Intl. Soc. Mag. Reson. Med. (15) 37, 2007.). Random walk diffusion is simulated to correlate the R-2-dispersion with the foam microstructure (i.e. the mean air bubble radius and standard deviation of the air bubble radius) and foam composition properties (i.e. magnetic susceptibilities, diffusion coefficient and surface relaxivity). Simulations of R-2-dispersion are in agreement with NMR measurements of a hydrogel foam. By correlating the R-2-dispersion parameters and microstructure properties a semi-empirical relationship is obtained that enables the mean air bubble size to be derived from measured R-2-dispersion curves. The, R-2-derived mean air bubble size of a hydrogel foam is in agreement with the bubble size measured with X-ray micro-CT. This illustrates The applicability of H-1 R-2-dispersion measurements for the macroscopic determination of the size of air bubbles in hydrogel foams and alveoli in lung tissue.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (proceedingsPaper)
publication status
published
subject
keyword
Internal gradients, Surface relaxation, Quantitative magnetic resonance imaging, Microstructure, Relaxometry, R2-dispersion, Random walk, Foam
in
AIP CONFERENCE PROCEEDINGS
MAGNETIC RESONANCE IN POROUS MEDIA
editor
M.D. Hürlimann, Y.Q. Song and P. Fantazzini
volume
1081
pages
4 pages
publisher
American Institute of Physics
place of publication
NY, USA
conference name
9th International Bologna Conference on Magnetic Resonance in Porous Media
conference location
Cambridge, MA, USA
conference start
2008-07-13
conference end
2008-07-17
Web of Science type
Proceedings Paper
Web of Science id
000262472000021
ISSN
0094-243X
ISBN
978-0-7354-0612-4
language
English
UGent publication?
yes
classification
P1
id
527222
handle
http://hdl.handle.net/1854/LU-527222
date created
2009-03-20 17:53:08
date last changed
2017-01-02 09:52:38
@inproceedings{527222,
  abstract     = {The spin-spin relaxation rate R-2 (-1/T-2) in hydrogel foams measured by use of a multi spin echo sequence is found to be dependent on the echo time spacing. This property, referred to as R-2-dispersion, originates from both surface relaxation and molecular self-diffusion of water within internal field gradients that result from magnetic susceptibility differences between the gel and air phase. In hydrogel foams, correlations between the average air bubble size and R-2-values are found (S. Baete and Y. De Deene, Proc. Intl. Soc. Mag. Reson. Med. (15) 37, 2007.). Random walk diffusion is simulated to correlate the R-2-dispersion with the foam microstructure (i.e. the mean air bubble radius and standard deviation of the air bubble radius) and foam composition properties (i.e. magnetic susceptibilities, diffusion coefficient and surface relaxivity). Simulations of R-2-dispersion are in agreement with NMR measurements of a hydrogel foam. By correlating the R-2-dispersion parameters and microstructure properties a semi-empirical relationship is obtained that enables the mean air bubble size to be derived from measured R-2-dispersion curves. The, R-2-derived mean air bubble size of a hydrogel foam is in agreement with the bubble size measured with X-ray micro-CT. This illustrates The applicability of H-1 R-2-dispersion measurements for the macroscopic determination of the size of air bubbles in hydrogel foams and alveoli in lung tissue.},
  author       = {Baete, Steven and De Deene, Yves},
  booktitle    = {AIP CONFERENCE PROCEEDINGS},
  editor       = {H{\"u}rlimann, M.D. and Song, Y.Q. and Fantazzini, P.},
  isbn         = {978-0-7354-0612-4},
  issn         = {0094-243X},
  keyword      = {Internal gradients,Surface relaxation,Quantitative magnetic resonance imaging,Microstructure,Relaxometry,R2-dispersion,Random walk,Foam},
  language     = {eng},
  location     = {Cambridge, MA, USA},
  pages        = {83--86},
  publisher    = {American Institute of Physics},
  title        = {R2-dispersion simulation of foam microstructure},
  volume       = {1081},
  year         = {2008},
}

Chicago
Baete, Steven, and Yves De Deene. 2008. “R2-dispersion Simulation of Foam Microstructure.” In Aip Conference Proceedings, ed. M.D. Hürlimann, Y.Q. Song, and P. Fantazzini, 1081:83–86. NY, USA: American Institute of Physics.
APA
Baete, S., & De Deene, Y. (2008). R2-dispersion simulation of foam microstructure. In M. D. Hürlimann, Y. Q. Song, & P. Fantazzini (Eds.), AIP CONFERENCE PROCEEDINGS (Vol. 1081, pp. 83–86). Presented at the 9th International Bologna Conference on Magnetic Resonance in Porous Media, NY, USA: American Institute of Physics.
Vancouver
1.
Baete S, De Deene Y. R2-dispersion simulation of foam microstructure. In: Hürlimann MD, Song YQ, Fantazzini P, editors. AIP CONFERENCE PROCEEDINGS. NY, USA: American Institute of Physics; 2008. p. 83–6.
MLA
Baete, Steven, and Yves De Deene. “R2-dispersion Simulation of Foam Microstructure.” Aip Conference Proceedings. Ed. M.D. Hürlimann, Y.Q. Song, & P. Fantazzini. Vol. 1081. NY, USA: American Institute of Physics, 2008. 83–86. Print.