Short-lag spatial coherence imaging on matrix arrays, part II: Phantom and in vivo experiments.

Jakovljevic M, Byram BC, Hyun D, Dahl JJ, Trahey GE
IEEE Trans Ultrason Ferroelectr Freq Control. 2014 61 (7): 1113-22

PMID: 24960701 · PMCID: PMC4234201 · DOI:10.1109/TUFFC.2014.3011

In Part I of the paper, we demonstrated through simulation the potential of volumetric short-lag spatial coherence (SLSC) imaging to improve visualization of hypoechoic targets in three dimensions. Here, we demonstrate the application of volumetric SLSC imaging in phantom and in vivo experiments using a clinical 3-D ultrasound scanner and matrix array. Using a custom single-channel acquisition tool, we collected partially beamformed channel data from the fully sampled matrix array at high speeds and created matched Bmode and SLSC volumes of a vessel phantom and in vivo liver vasculature. 2-D and 3-D images rendered from the SLSC volumes display reduced clutter and improved visibility of the vessels when compared with their B-mode counterparts. We use concurrently acquired color Doppler volumes to confirm the presence of the vessels of interest and to define the regions inside the vessels used in contrast and contrast-to-noise ratio (CNR) calculations. SLSC volumes show higher CNR values than their matched B-mode volumes, while the contrast values appear to be similar between the two imaging methods.

MeSH Terms (18)

Adult Algorithms Computer Simulation Equipment Design Equipment Failure Analysis Female Hepatic Artery Humans Image Interpretation, Computer-Assisted Male Microarray Analysis Middle Aged Models, Theoretical Phantoms, Imaging Reproducibility of Results Sensitivity and Specificity Tomography, Optical Coherence Ultrasonography

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