Title :
Coherent Image Herding of Inhomogeneous Motion Compensation for Synthetic Transmit Aperture in Ultrasound Image
Author :
Yu-Hao Chen ; Kuan-Yu Ho ; Cheng-Zhou Zhan ; An-Yeu Wu
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
Synthetic transmit aperture (STA) has been extensively used in ultrasound system recently because of its high frame rate and high image quality. However, STA is susceptible to motion artifacts. Some studies have proposed strategies to overcome this problem, but the image quality still degrades in inhomogeneous motion environment, which means that tissue moves in different directions and speed. In this work, we propose the coherent image herding (CIH) method to form high resolution image (HRI) with better image quality by determining whether the compensated low resolution image (LRI) needs to be chosen to form better HRI and subsequently performing a cross-correlation analysis on the raw channel data between the selected LRIs. In simulation results, the proposed method can obtain better HRI in the inhomogeneous motion environment, and it improves the contrast ratio (CR) and contrast noise ratio (CNR) about 9.5 dB and 1.5 dB respectively with only 0.71% computational complexity larger than the referenced work in the cyst phantom simulation using Field II program.
Keywords :
biomedical ultrasonics; computational complexity; correlation methods; image resolution; medical image processing; motion compensation; Field II program; coherent image herding; computational complexity; contrast noise ratio; contrast ratio; cross-correlation analysis; cyst phantom simulation; high resolution image; image quality; inhomogeneous motion compensation; inhomogeneous motion environment; low resolution image compensation; motion artifact; synthetic transmit aperture; ultrasound image; ultrasound system; Apertures; Correlation; Image quality; Image resolution; Imaging; Motion compensation; Transducers; beamforming; motion compensation; synthetic aperture; synthetic transmit aperture; ultrasound;
Conference_Titel :
Signal Processing Systems (SiPS), 2012 IEEE Workshop on
Conference_Location :
Quebec City, QC
Print_ISBN :
978-1-4673-2986-6
DOI :
10.1109/SiPS.2012.17