Papers Published

1. Friemel, B.H. and Boho, L.N. and Trahey, G.E., A real-time system for angle-independent velocity detection, IEEE 1991 Ultrasonics Symposium Proceedings. (Cat. No.91CH3079-1) (1991), pp. 1265 - 8 [ULTSYM.1991.234318] .
   (last updated on 2007/04/13)

   Abstract:
   The first real-time angle-independent velocity detection system for ultrasound has been constructed. The system detects both the axial and lateral components of velocity using the sum absolute difference algorithm, a novel time-domain method for tracking speckle patterns. In addition to quantifying 2-D velocities, the system rejects echoes according to absolute brightness and vectors according to a best match criterion, filters the flow image and presents the information as a color map to the physician each 30-50 ms. Preliminary results are presented along with an introduction to the system architecture, a discussion of clinical applications and an outline of future directions for the project

   Keywords:
   biomedical measurement;biomedical ultrasonics;real-time systems;ultrasonic velocity measurement;