Evaluation of Tissue Motion Vector Measurement System Utilizing Synthetic-Aperture Array Signal Processing for Real-Time Elastography
Real-time elastography is a promising dynamic tool providing viscoelastic properties of living tissue in vivo by advanced evaluation of the spatio-temporal vector motion in tissue. This study experimentally verified the performance of our proposed measurement system for practical evaluation of two-dimensional motion vector dynamics followed by pulsed shear wave generation and its propagation across a phantom.
Key wordsReal-time elastography Synthetic aperture Array signal processing Virtual source generation Spherical irradiation Local phase difference Cross-correlation Successive echo frames
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- 1.H. Machida and S. Yagi: “Tissue Dynamic Imaging of Shear Wave Traveling across a Liver Tissue Stressed by Heart-beat Using Real-Time Displacement Tomography,” Proc. Int. Conf. Acoust. 2004, pp. 907–908, 2004.Google Scholar
- 3.S. Yagi, A. Sanuga, K. Kondo, K. Tamura and M. Sato: “Analysis of transient shear wave generation for real-time elastography,” Proc. 2005 IEEE Ultrason. Symp., vol. 2, pp. 18–21, 2006.Google Scholar
- 4.S. Yagi and Y. Minochi: “High-precision real-time evaluation of tissue local motion vectors utilizing synthetic aperture array-signal processing,” Proc. Int. Conf. Acoust. 2004, pp. 905–906, 2004.Google Scholar
- 6.S. Yagi, A. Sanuga, T. Nishiyama, K. Tamura and M. Sato: “Evaluation of Tissue Motion Vector Distribution utilizing Synthetic Aperture Array-Signal Processing Triggered with Successive Virtual Source Generation,” Proc. 2006 IEEE Ultrason. Symp., pp. 1205–1208, 2007.Google Scholar