Title :
50 MHz color flow mapping
Author :
Ferrara, K. Whittaker ; Zagar, B. ; Silverman, R. ; Aggarwal, K. ; Dayton, P. ; Sokil-Melgar, J. ; Aslanidis, Y.
Author_Institution :
Virginia Univ., Charlottesville, VA, USA
Abstract :
Following our previous work on the estimation of blood velocity using high frequency ultrasound, we demonstrate the generation of in-vivo two dimensional (2D) color flow maps. In this paper, using a transducer with a nominal center frequency of 50 MHz, we demonstrate that velocities below 1 mm/s can be distinguished from the surrounding tissue. High resolution 2D maps of very low velocity blood flow within the ciliary body and processes of the rabbit eye are presented
Keywords :
acoustic correlation; biomedical ultrasonics; blood flow measurement; eye; image colour analysis; image resolution; medical image processing; ultrasonic transducers; 50 MHz; blood velocity estimation; ciliary body; color flow mapping; high frequency ultrasound; high resolution 2D maps; in-vivo two dimensional color flow maps; rabbit eye; transducer; very low velocity blood flow; Bandwidth; Blood flow; Control systems; Frequency estimation; Pulse amplifiers; Rabbits; Scattering; Space vector pulse width modulation; Ultrasonic transducers; Velocity control;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495839
