Title :
Application of ultrasound-based velocity estimate statistics to strain-rate estimation
Author :
Jackson, John I. ; Thomas, Lewis J.
Author_Institution :
Ultrasound Div., Siemens Med. Solution USA, Inc., Mountain View, CA, USA
Abstract :
Quantification of the relative myocardial deformation rate, or strain rate, is an emerging capability to aid a cardiologist in assessing myocardial function. Ultrasound Doppler techniques can be used to compute tissue motion relative to a transducer. The myocardial strain rate can be computed as the localized spatial derivative of the tissue velocity. Such a strain-rate estimate is typically numerically noisy. We present the relevant speckle statistics to faciliate the computation of the strain rate based on a weighted least squares regression, with statistically appropriate weights.
Keywords :
Doppler effect; biomedical ultrasonics; cardiology; internal stresses; least squares approximations; regression analysis; speckle; ultrasonic imaging; ultrasonic velocity; cardiologist; myocardial function; myocardial strain rate; quantification; relative myocardial deformation rate; spatial derivative; speckle statistics; statistically appropriate weights; strain rate estimation; tissue motion; tissue velocity; transducer; ultrasound Doppler techniques; ultrasound-based velocity estimate statistics; weighted least squares regression; Capacitive sensors; Cardiology; Magnetic field induced strain; Magnetic resonance imaging; Motion measurement; Myocardium; Statistics; Strain measurement; Ultrasonic imaging; Ultrasonic variables measurement; Child; Echocardiography; Elasticity; Heart; Humans; Image Interpretation, Computer-Assisted; Male; Models, Cardiovascular; Models, Statistical; Motion; Stochastic Processes; Stress, Mechanical;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2003.1251130
