1991
DOI: 10.1121/1.400370
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A small volume thermodynamic system for B/A measurement

Abstract: A thermodynamic method capable of determining the B/A value of 4-ml sample volumes is described. The method involves a procedure in which the static pressure of the sample is altered in a short period of time, to approximate an adiabatic process, during which the ultrasonic velocity is measured. The velocity change so determined is used to calculate the B/A value. The B/A measurement error is less than 0.7%.

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Cited by 17 publications
(4 citation statements)
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“…The availability of small amounts of biological samples have frequently caused problems for experimental determinations of B /A. However, most recently a thermodynamic method capable of determining the B/A value of a 4-ml sample volume with a measurement error less than 0.7% has been reported [44]. The method involves a procedure in which the static pressure of the sample is altered very fast, to approximate and adiabatic process, dunng during which the ultrasonic velocity, to form a basis for the calculation of B/A, is measured.…”
Section: + E [9200]mentioning
confidence: 99%
“…The availability of small amounts of biological samples have frequently caused problems for experimental determinations of B /A. However, most recently a thermodynamic method capable of determining the B/A value of a 4-ml sample volume with a measurement error less than 0.7% has been reported [44]. The method involves a procedure in which the static pressure of the sample is altered very fast, to approximate and adiabatic process, dunng during which the ultrasonic velocity, to form a basis for the calculation of B/A, is measured.…”
Section: + E [9200]mentioning
confidence: 99%
“…This range is very small in comparison with the range of a, and thus it is attenuation that dominates the difference in non-linear behaviour between low-loss fluids and soft tissues. The preferred method of measurement is the thermodynamic method [35][36][37], replacing the less accurate finite-amplitude method [38,39], at least when large volumes of material are available. The thermodynamic method requires the measurement of sound velocity as a function of hydrostatic pressure and temperature.…”
Section: Non-linear Propagation In Soft Tissuesmentioning
confidence: 99%
“…One can distinguish between two families for measuring the nonlinear ultrasound BIA parameter [1][2][3]. This factor may be deduced by the so called thermodynamic or finite amplitude methods.…”
Section: Introductionmentioning
confidence: 99%