Title :
Ultrasound-based strain rate estimation of moving, fully-developed speckle
Author :
Jackson, John I. ; Thomas, Lewis J.
Author_Institution :
Siemens Co., Mountain View, CA, USA
Abstract :
Strain rate is a measurement that may aid a cardiologist in assessing myocardial function. Ultrasound Doppler techniques can be used to compute tissue velocity relative to a transducer, and the myocardial strain rate is the localized spatial derivative of the tissue velocity. Such a strain rate estimate is typically numerically noisy. We derive the relevant speckle statistics to faciliate the use of a weighted least squares regression to estimate the strain rate, showing that a statistically appropriate weighting is the product of the ultrasound signal amplitudes
Keywords :
Doppler measurement; biological tissues; biomedical ultrasonics; cardiology; least squares approximations; speckle; statistical analysis; cardiology; myocardial strain rate; speckle statistics; tissue velocity; ultrasound Doppler measurement; weighted least squares regression; Capacitive sensors; Cardiology; Least squares approximation; Myocardium; Speckle; Statistics; Strain measurement; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 2001 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-7177-1
DOI :
10.1109/ULTSYM.2001.992026
