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Influence of transmit beamforming parameters on image quality in quantitative elastography

High levels of noise in shear wave elastography can lead to inaccurate shear wave velocity estimates or false negatives in the detection of masses such as tumors. Recent work has shown that ultrasound speckle can be a significant source of noise in conventional, multiple tracking location (MTL) shear wave elasticity imaging, particularly when small beam spacings are employed to achieve a high spatial resolution. An alternative approach, termed single tracking location (STL), appears to produce images that are immune to speckle noise but subject to errors from push beam variance. The objective of this study is to quantify the effects of transmit beamforming parameters on STL and MTL image noise. These data will provide guidance for the selection of STL or MTL methods, and the optimal beamforming parameters in a particular imaging situation.