Title :
The ultrasonic attenuation coefficient for human blood plasma in the frequency range of 7-90 MHz
Author :
Filho, M. M Calor ; Machado, J.C.
Author_Institution :
PETROBRAS, Rio de Janeiro, Brazil
Abstract :
This work presents experimental results of the ultrasound attenuation coefficient of human blood plasma in the frequency range of 7-90 MHz. Measurements were done with a sample of 450 μL of plasma immersed in a water bath with the temperature controlled at 36.5°C. The results follow the power law frequency dependence with an exponent of 1.43, compatible with the literature results for low frequency. Also, the results indicate a relaxation mechanism in the vicinity of 10 MHz.
Keywords :
biomedical ultrasonics; blood; haemodynamics; ultrasonic absorption; ultrasonic measurement; ultrasonic propagation; 10 MHz; 36.5 C; 7 to 90 MHz; frequency range; human blood plasma; power law frequency dependence; relaxation mechanism; temperature controlled water bath plasma immersion; ultrasonic attenuation coefficient; Absorption; Attenuation; Biomedical measurements; Blood; Frequency; Humans; Plasma measurements; Plasma temperature; Ultrasonic imaging; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1418244
