Abstract
A method is discussed for measuring isentropic and isothermal components of B/A. Measurements of these parameters of excised human tissues indicate fatty tissues to be highly nonlinear to sound propagation. The isentropic and isothermal components of B/A of aqueous solutions of alcohol go through a minimum at 10% volume fraction as the concentration of alcohol is increased. Sound speed shows a maximum at 20% concentration. These changes in acoustic parameter with alcohol concentration are qualitatively explained in terms of the variations in the free and the bound states of water due to the addition of alcohols. The possibility of imaging weighted nonlinear parameter of excised breast by measuring the difference frequency generated by transmitting two frequencies of ultrasound is also discussed.
| Original language | English (US) |
|---|---|
| Title of host publication | Ultrasonics Symposium Proceedings |
| Publisher | IEEE |
| Pages | 883-886 |
| Number of pages | 4 |
| State | Published - 1985 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
RELATIONSHIP BETWEEN ACOUSTIC NONLINEARITY AND THE BOUND AND THE UNBOUND STATES OF WATER. / Sehgal, C. M.; Porter, B.; Greenleaf, James F.
Ultrasonics Symposium Proceedings. IEEE, 1985. p. 883-886.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - RELATIONSHIP BETWEEN ACOUSTIC NONLINEARITY AND THE BOUND AND THE UNBOUND STATES OF WATER.
AU - Sehgal, C. M.
AU - Porter, B.
AU - Greenleaf, James F
PY - 1985
Y1 - 1985
N2 - A method is discussed for measuring isentropic and isothermal components of B/A. Measurements of these parameters of excised human tissues indicate fatty tissues to be highly nonlinear to sound propagation. The isentropic and isothermal components of B/A of aqueous solutions of alcohol go through a minimum at 10% volume fraction as the concentration of alcohol is increased. Sound speed shows a maximum at 20% concentration. These changes in acoustic parameter with alcohol concentration are qualitatively explained in terms of the variations in the free and the bound states of water due to the addition of alcohols. The possibility of imaging weighted nonlinear parameter of excised breast by measuring the difference frequency generated by transmitting two frequencies of ultrasound is also discussed.
AB - A method is discussed for measuring isentropic and isothermal components of B/A. Measurements of these parameters of excised human tissues indicate fatty tissues to be highly nonlinear to sound propagation. The isentropic and isothermal components of B/A of aqueous solutions of alcohol go through a minimum at 10% volume fraction as the concentration of alcohol is increased. Sound speed shows a maximum at 20% concentration. These changes in acoustic parameter with alcohol concentration are qualitatively explained in terms of the variations in the free and the bound states of water due to the addition of alcohols. The possibility of imaging weighted nonlinear parameter of excised breast by measuring the difference frequency generated by transmitting two frequencies of ultrasound is also discussed.
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UR - http://www.scopus.com/inward/citedby.url?scp=0022291914&partnerID=8YFLogxK
M3 - Conference contribution
SP - 883
EP - 886
BT - Ultrasonics Symposium Proceedings
PB - IEEE
ER -