An ultrasonic method for detection of fluid properties in the paranasal sinuses
(2005) 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:
https://lup.lub.lu.se/record/616100
- author
- Jansson, Tomas LU ; Ask, B ; Walfridsson, P ; Sahlstrand-Johnson, P ; Persson, Hans W LU ; Holmer, Nils-Gunnar LU and Jannert, Magnus LU
- organization
- publishing date
- 2005
- 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
- host publication
- 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
- conference location
- Umea, Sweden
- conference dates
- 2005-06-13 - 2005-06-17
- ISBN
- 91-7305-910-2
- language
- English
- LU publication?
- yes
- id
- 3f8ef359-7136-4471-87c3-c03d6f891005 (old id 616100)
- date added to LUP
- 2016-04-04 11:37:21
- date last changed
- 2018-11-21 21:06:04
@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<sup>2</sup>=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}},
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}},
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}},
}