Title :
An ultrasound contrast agent´s influence on the measured Doppler signal
Author :
Sponheim, Nills ; Myhrum, Marte
Author_Institution :
Clinical R&D, Nycomed Imaging AS, Oslo, Norway
Abstract :
The purpose of this study was to investigate the possible factors that may influence the Doppler frequency spectrum when an ultrasound contrast agent is used to enhance the signal. Computer simulations of limited frequency resolution and attenuation over the sample volume has been compared to in vitro measurements. The results show that the limited frequency resolution may influence the maximum velocity estimate and the attenuation over the sample volume is of less clinical importance. An ultrasound contrast agent´s main influence on a Doppler measurement is a pure signal enhancement
Keywords :
Doppler measurement; biomedical ultrasonics; blood flow measurement; Doppler frequency spectrum; attenuation; computer simulations; limited frequency resolution; maximum velocity estimate; measured Doppler signal; pure signal enhancement; ultrasound contrast agent; Attenuation measurement; Computer simulation; Doppler measurements; Frequency estimation; Frequency measurement; In vitro; Signal resolution; Ultrasonic imaging; Ultrasonic variables measurement; Volume measurement;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495760
