Wall filtering challenges in two-dimensional vector velocity estimation


Conference Paper

To formulate a clinically viable methodology for tracking blood flow in two dimensions using ultrasound, one must address some challenges posed by the physical limitations of the imaging modality. At the frequencies of interest in medical diagnostic imaging, the echoes from blood are much smaller (often 40-60 dB) than those from the surrounding vessel walls. A blood velocity estimation technique must isolate the blood echo from that of the wall, and that is most often accomplished through the use of wall filters. The conventional application of wall filters to two-dimensional velocity estimation is aggravated, however, by the fact that the azimuthal spatial frequency content of conventional two-dimensional ultrasound scans is typically 5-10 times smaller than the axial spatial frequency content. In this paper, we pose the problem of isolating the blood signal within the composite blood/wall/noise signal received by the imaging system and estimate the effectiveness of wall filters to eliminate stationary echoes from both the axial and azimuthal components of motion.

Duke Authors

Cited Authors

  • Friemel, BH; Nightingale, KR; Bohs, LN; Trahey, GE

Published Date

  • December 1, 1993

Published In

Volume / Issue

  • 2 /

Start / End Page

  • 1031 - 1034

International Standard Serial Number (ISSN)

  • 1051-0117

International Standard Book Number 10 (ISBN-10)

  • 0780312783

Citation Source

  • Scopus