Prior to 2007

Signal Processing Methods for Classification of Arterial Plaques using Absolute Ultrasound Backscatter Measurements

Tuesday, November 30, 1999, AK232, 3:00 p.m.
Prof. Peder C. Pedersen
Dept. of Electrical and Computer Engineering

Abstract

This talk will describe an Ultrasound technique for determining the absolute backscatter characteristics ("backscatter signature") of arterial plaques, for the purpose of developing an improved in vivo technique for classifying such plaques according to stroke risk. The challenge lies in overcoming the phase-aberrating effects of the tissue layers which lie between the transducer placed on the skin and the plaques inside the artery. These tissue layers introduce random amounts of phase cancellation as well as non-stationary clutter. The approach makes use of a reference signal in the form of the stochastic backscatter signal from a blood volume, adjacent to the plaque.

The talk will introduce the goals of the Research, describe the concept, and outline the signal processing steps and the stochastic Modeling. The design and implementation of the experimental system will follow, concluding with experimental results.

November 30, 1999