Title :
Reduction of the decorrelation effect due to tissue lateral displacement by 2-D spatial comprehensive correlation in elastography
Author :
Ding, Chuxiong ; Bai, Jing
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
Abstract :
The cross-correlation based ultrasonic elastography is limited for application due to distortion of the echo waveform by tissue lateral deformation during axial compression. To reduce this kind of decorrelation effect, a time-efficient method called a 2-D spatial comprehensive correlation algorithm is proposed. The basic idea of this method is to combine spatial adjacent cross-correlation functions as a comprehensive time shift estimator. A simulation model based on finite element analysis is applied to evaluate the method proposed in this work. Results indicate that this method can reduce the decorrelation effect of tissue lateral displacement with less increase of computation.
Keywords :
acoustic correlation; acoustic distortion; biological tissues; biomechanics; biomedical ultrasonics; decorrelation; echo; finite element analysis; medical image processing; 2-D spatial comprehensive correlation; 2-D spatial comprehensive correlation algorithm; axial compression; comprehensive time shift estimator; cross-correlation based ultrasonic elastography; decorrelation effect; decorrelation effect reduction; echo waveform distortion; elastography; finite element analysis; simulation model; soft tissues; spatial adjacent cross-correlation functions; time-efficient method; tissue lateral deformation; tissue lateral displacement; ultrasound echo signal; Acoustic scattering; Analytical models; Biomedical engineering; Capacitive sensors; Computational modeling; Decorrelation; Finite element methods; Target tracking; Ultrasonic imaging; Uniaxial strain;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1017249
