Title :
Ultrasonic Doppler measurements of blood flow velocity of rabbit retinal vessels with high-frequency angled needle transducer
Author :
Chen, Ruimin ; Paeng, Dong-Guk ; Matsuoka, Naoki ; Ameri, Hossein ; Zhou, Qifa ; Humayun, Mark ; Shung, K. Kirk
Author_Institution :
Dept. of Biomed. Eng., Univ. of Southern California, Los Angeles, CA
Abstract :
This paper presents a systematic ultrasonic Doppler measurement of retinal blood flow in vivo. In the method, a needle transducer with a beveled tip of 45deg was inserted into the vitreous cavity to access retinal vessels in the rabbit eye. A directional high-frequency (HF) pulsed-wave (PW) Doppler system was used to measure the blood flow velocity from different locations of rabbit retina vessels. The results indicate that the ultrasonic Doppler measurements of retinal blood speed were repeatable and reliable. This measurement would be useful to investigate retinal vein occlusion and to monitor blood speed of retinal vessels during/after surgery.
Keywords :
Doppler measurement; biomedical transducers; biomedical ultrasonics; blood flow measurement; blood vessels; eye; surgery; ultrasonic transducers; velocity measurement; angled needle transducer; blood flow velocity measurement; blood speed monitoring; high-frequency pulsed-wave Doppler system; retinal vein occlusion; retinal vessel; ultrasonic Doppler measurement; vitreous cavity; Blood flow; Doppler measurements; Needles; Pulse measurements; Rabbits; Retina; Retinal vessels; Ultrasonic transducers; Ultrasonic variables measurement; Velocity measurement; angled PMN-PT needle transducer; high-frequency ultrasound Doppler; retinal blood flow velocity;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0392
