Title :
Evaluation of a multi frequency technique for blood perfusion measurements
Author :
Jansson, T. ; Persson, H.W. ; Lindström, K.
Author_Institution :
Dept. of Electr. Meas., Lund Inst. of Technol., Sweden
Abstract :
CW Doppler measurements were performed on a perfusion phantom with a fixed transducer position and transmit frequencies ranging from 9.9 to 10.1 MHz. The observed large power variations in the received Doppler spectra were explained by a theoretical model to be not primarily variations in sensitivity amplitude within the sample volume, but rather the result of a speckle effect
Keywords :
Doppler measurement; biomedical ultrasonics; blood flow measurement; haemorheology; ultrasonic transducers; 9.9 to 10.1 MHz; CW Doppler measurements; blood perfusion measurements; capillary level circulation; fixed transducer position; large power variations; multi frequency technique; perfusion phantom; received Doppler spectra; sample volume; sensitivity amplitude; speckle effect; transmit frequencies; Acoustic transducers; Blood; Electric variables measurement; Frequency estimation; Frequency measurement; Geometry; Imaging phantoms; Speckle; Transmitters; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-3615-1
DOI :
10.1109/ULTSYM.1996.584209
