Title :
Quantitative ultrasonic interferometry applicable to differential transit time flow measurement: preliminary report
Author :
Franklin, Dean ; Caldwell, W.M. ; Erdal, Thomas
Author_Institution :
Dept. of Physiol., Missouri Univ., Columbia, MO, USA
Abstract :
The relative phase of two interfering coherent signals may be quantitatively derived from the amplitudes of the incident signals and the combined, destructive interference signal. The authors applied this concept to measurement of the small differences in transit time between two wave trains of ultrasound simultaneously traversing water flowing through a traditional (3 cm) differential transit time ultrasonic flow transducer. Preliminary tests with a passive ultrasonic interferometer validate the approach and demonstrate applicability to measurement of blood and other fluid flows
Keywords :
acoustic wave interferometry; biomedical ultrasonics; blood flow measurement; 3 cm; combined destructive interference signal; differential transit time flow measurement; fluid flow measurement; incident signals amplitude; interfering coherent signals relative phase; quantitative ultrasonic interferometry; ultrasound wave trains; water flow; Blood; Fluid flow; Fluid flow measurement; Interference; Interferometry; Testing; Time measurement; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.575279
