Title :
Duplex synthetic aperture imaging with tissue motion compensation
Author :
Gammelmark, Kim Løkke ; Jensen, Jørgen Arendt
Author_Institution :
Center for Fast Ultrasound Imaging, Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
This paper investigates a method for tissue motion estimation and compensation in synthetic transmits aperture imaging. The approach finds the tissue velocity and the direction of the motion at very tissue region by cross-correlating high resolution lines beamformed along multiple directions at each image points. Compensation is applied in the beamformer by tracking the image points using the velocity and angle estimates from the closest estimation point. Simulation results using Field II show nearly perfect motion compensation with no appreciable difference in contrast resolution after compensation. Phantom measurements show similar performance with differences in contrast resolution of 29% and 0.61% before and after compensation, respectively.
Keywords :
imaging; motion compensation; motion estimation; phantoms; tissue engineering; Field II; angle estimates; beamformer compensation; contrast resolution; cross-correlating lines; duplex synthetic aperture imaging; estimation point; high resolution lines; image points; multiple directions; phantom measurements; synthetic transmits aperture imaging; tissue motion compensation; tissue motion estimation; tissue region; tissue velocity; velocity estimates; Chirp modulation; High-resolution imaging; Image quality; Image resolution; Imaging phantoms; Motion compensation; Motion estimation; Phased arrays; Spatial resolution; Ultrasonic imaging;
Conference_Titel :
Ultrasonics, 2003 IEEE Symposium on
Print_ISBN :
0-7803-7922-5
DOI :
10.1109/ULTSYM.2003.1293207
