Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
J Biomed Opt. 2010 Sep-Oct;15(5):056014. doi: 10.1117/1.3494565.

Absolute blood velocity measured with a modified fundus camera.

Author information

  • 1Portland State University, Department of Electrical and Computer Engineering, 1900 Southwest Fourth Avenue, Portland, Oregon 97201, USA. donald.duncan@pdx.edu

Abstract

We present a new method for the quantitative estimation of blood flow velocity, based on the use of the Radon transform. The specific application is for measurement of blood flow velocity in the retina. Our modified fundus camera uses illumination from a green LED and captures imagery with a high-speed CCD camera. The basic theory is presented, and typical results are shown for an in vitro flow model using blood in a capillary tube. Subsequently, representative results are shown for representative fundus imagery. This approach provides absolute velocity and flow direction along the vessel centerline or any lateral displacement therefrom. We also provide an error analysis allowing estimation of confidence intervals for the estimated velocity.

PMID:
21054108
[PubMed - indexed for MEDLINE]
PMCID:
PMC2966492
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for Silverchair Information Systems Icon for PubMed Central
    Loading ...
    Write to the Help Desk