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An ultrasonic method for detection of fluid properties in the paranasal sinuses

Jansson, Tomas LU ; Ask, B; Walfridsson, P; Sahlstrand-Johnson, P; Persson, Hans W LU ; Holmer, Nils-Gunnar LU and Jannert, Magnus LU (2005) Proceedings of the International Federation for Medical & Biomedical Engineering. 13th Nordic Baltic Conference on Biomedical Engineering and Medical Physics In Proceedings of the International Federation for Medical & Biomedical Engineering. 13th Nordic Baltic Conference on Biomedical Engineering and Medical Physics p.115-116
Abstract
We propose a method for detection of the degree of infection in the paranasal sinuses utilizing a previously published method whereby the viscosity in a sealed container may be measured using an ultrasound Doppler method. As ultrasound propagates in a liquid medium, due to attenuation, the resulting pressure gradient will cause the liquid to move in the propagation direction - the wellknown effect of acoustic streaming. The streaming velocity will, for a given acoustic output, be proportional to the viscosity of the fluid. In this study, we verify that acoustic streaming can be induced in an anthropomorphic sinus phantom cast from a human cranium. The sinus phantom was made from agar with added graphite providing sound attenuation prior to... (More)
We propose a method for detection of the degree of infection in the paranasal sinuses utilizing a previously published method whereby the viscosity in a sealed container may be measured using an ultrasound Doppler method. As ultrasound propagates in a liquid medium, due to attenuation, the resulting pressure gradient will cause the liquid to move in the propagation direction - the wellknown effect of acoustic streaming. The streaming velocity will, for a given acoustic output, be proportional to the viscosity of the fluid. In this study, we verify that acoustic streaming can be induced in an anthropomorphic sinus phantom cast from a human cranium. The sinus phantom was made from agar with added graphite providing sound attenuation prior to the sinus cavity corresponding to an in vivo situation. A number of water-glycerol solutions with scattering particles, were prepared to mimic a clinically interesting range of viscosities (7-47 mPas). Using a 4.2 MHz continuous wave Doppler probe, clearly detectable Doppler shifts in the range of 6.5 to 20 Hz were recorded. A linear relationship was found between the Doppler shifts and 1/viscosity (R<sup>2</sup>=0.94, corrected for the square-law dependence of sound speed variation due to varying glycerol concentration) (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
water-glycerol solution, continuous wave Doppler probe, scattering particles, 4.2 MHz, Doppler shifts, 6.5 to 20 Hz, sinus cavity, sound attenuation, graphite, agar, human cranium, anthropomorphic sinus phantom, streaming velocity, acoustic streaming effect, fluid viscosity measurement, infection detection, paranasal sinuses, ultrasonic Doppler method, fluid property detection
in
Proceedings of the International Federation for Medical & Biomedical Engineering. 13th Nordic Baltic Conference on Biomedical Engineering and Medical Physics
pages
115 - 116
publisher
Int. Federation for Medical and Biological Eng
conference name
Proceedings of the International Federation for Medical & Biomedical Engineering. 13th Nordic Baltic Conference on Biomedical Engineering and Medical Physics
ISBN
91-7305-910-2
language
English
LU publication?
yes
id
3f8ef359-7136-4471-87c3-c03d6f891005 (old id 616100)
date added to LUP
2007-11-25 12:22:56
date last changed
2016-04-16 09:28:52
@inproceedings{3f8ef359-7136-4471-87c3-c03d6f891005,
  abstract     = {We propose a method for detection of the degree of infection in the paranasal sinuses utilizing a previously published method whereby the viscosity in a sealed container may be measured using an ultrasound Doppler method. As ultrasound propagates in a liquid medium, due to attenuation, the resulting pressure gradient will cause the liquid to move in the propagation direction - the wellknown effect of acoustic streaming. The streaming velocity will, for a given acoustic output, be proportional to the viscosity of the fluid. In this study, we verify that acoustic streaming can be induced in an anthropomorphic sinus phantom cast from a human cranium. The sinus phantom was made from agar with added graphite providing sound attenuation prior to the sinus cavity corresponding to an in vivo situation. A number of water-glycerol solutions with scattering particles, were prepared to mimic a clinically interesting range of viscosities (7-47 mPas). Using a 4.2 MHz continuous wave Doppler probe, clearly detectable Doppler shifts in the range of 6.5 to 20 Hz were recorded. A linear relationship was found between the Doppler shifts and 1/viscosity (R&lt;sup&gt;2&lt;/sup&gt;=0.94, corrected for the square-law dependence of sound speed variation due to varying glycerol concentration)},
  author       = {Jansson, Tomas and Ask, B and Walfridsson, P and Sahlstrand-Johnson, P and Persson, Hans W and Holmer, Nils-Gunnar and Jannert, Magnus},
  booktitle    = {Proceedings of the International Federation for Medical & Biomedical Engineering. 13th Nordic Baltic Conference on Biomedical Engineering and Medical Physics},
  isbn         = {91-7305-910-2},
  keyword      = {water-glycerol solution,continuous wave Doppler probe,scattering particles,4.2 MHz,Doppler shifts,6.5 to 20 Hz,sinus cavity,sound attenuation,graphite,agar,human cranium,anthropomorphic sinus phantom,streaming velocity,acoustic streaming effect,fluid viscosity measurement,infection detection,paranasal sinuses,ultrasonic Doppler method,fluid property detection},
  language     = {eng},
  pages        = {115--116},
  publisher    = {Int. Federation for Medical and Biological Eng},
  title        = {An ultrasonic method for detection of fluid properties in the paranasal sinuses},
  year         = {2005},
}