All measurement techniques to date, which are applicable to determining backscatter coefficients in vivo involve the projection of a pulsed ultrasound beam into a volume of tissue and the monitoring of echo signals due to scattering from a region in the tissue. Various approximations have been applied to obtain values for the backscatter coefficient, n( omega ), where omega is the frequency. A method of data reduction which avoids uncertainties is described. The method can be applied for any combination of focused or nonfocused and narrow or broad-band transducers. Also, the region interrogated is not limited to the far field or (in the case of a focused transducer) to the focal region of the transducer. This method differs from others in that the time gate is explicitly treated in time and frequency domains. In addition the method includes a technique for determining the number of scatterers per unit volume using the same set of measurements used to determine n( omega ).
|Original language||English (US)|
|Title of host publication||Proceedings of the Annual Meeting of the American Institute of Ultrasound in Medicine|
|Publisher||American Inst of Ultrasound in Medicine (Suppl to Journal of Ultrasound in Medicine v 3 n 9 Sep 1984)|
|Number of pages||1|
|State||Published - Dec 1 1984|
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