The emergence of ultrafast frame rates in ultrasonic imaging has been recently made
possible by the development of new imaging modalities such as transient elastography.
Data acquisition rates reaching more than thousands of images per second enable the real-
time visualization of shear mechanical waves propagating in biological tissues, which
convey information about local viscoelastic properties of tissues. The first proposed
approach for reaching such ultrafast frame rates consists of transmitting plane waves into the …

Coherent plane wave compounding is a promising technique for achieving very high frame
rate imaging without compromising image quality or penetration. However, this approach
relies on the hypothesis that the imaged object is not moving during the compounded scan
sequence, which is not the case in cardiovascular imaging. This work investigates the effect
of tissue motion on retrospective transmit focusing in coherent compounded plane wave
imaging (PWI). Two compound scan sequences were studied based on a linear and …