A comparison between generalized coherence factor and short-LAG spatial coherence methods

Typical ultrasound image beamforming is based on delay and sum of received echoes. Sound speed inhomogeneity, phase aberration and acoustic clutter induce errors in the beamformed signals. Therefore, coherence-based techniques such as Generalized Coherence Factor (GCF) and Short-lag Spatial Coherence (SLSC) have been developed to reduce these errors. GCF has been used as a weighting factor applied to the conventional image (b-mode), and SLSC has been used as a new standalone image. In this study, a new approach for comparison of both techniques is proposed by using GCF and SLSC as weighting factors and standalone images. Image contrast and contrast-to-noise (CNR) were evaluated to analyze the approaches' performance.

[1]  Sung-Bae Park,et al.  Short-lag spatial coherence combined with synthetic aperture imaging , 2013, 2013 IEEE International Ultrasonics Symposium (IUS).

[2]  Pai-Chi Li,et al.  Adaptive imaging using the generalized coherence factor. , 2003, IEEE transactions on ultrasonics, ferroelectrics, and frequency control.

[3]  G. E. Trahey,et al.  Short-lag spatial coherence of backscattered echoes: imaging characteristics , 2011, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[4]  K. Boone,et al.  Effect of skin impedance on image quality and variability in electrical impedance tomography: a model study , 1996, Medical and Biological Engineering and Computing.

[5]  J. Arendt.  Paper presented at the 10th Nordic-Baltic Conference on Biomedical Imaging: Field: A Program for Simulating Ultrasound Systems , 1996 .

[6]  Sverre Holm,et al.  Wiener beamforming and the coherence factor in ultrasound imaging , 2010, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[7]  G. E. Trahey,et al.  Comparative resolution and tracking performance in B-mode and short-lag spatial coherence (SLSC) images , 2011, 2011 IEEE International Ultrasonics Symposium.

[8]  Pai-Chi Li,et al.  Performance Evaluation of Coherence-Based Adaptive Imaging Using Clinical Breast Data , 2007, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[9]  G. Trahey,et al.  Comparative evaluation of wavefront coherence imaging methods in the presence of clutter , 2011, 2011 IEEE International Ultrasonics Symposium.