Experimental Validation of continuous Emission Ultrafast Ultrasound Imaging

Conventional ultrasound imaging relies on the pulse–echo (PE) paradigm, which inherently limits the frame rate and leaves the system blind during the receive period. To address these limitations, Continuous Emission Ultrasound Imaging (CEUI) has been proposed as a new approach that continuously insonifies the medium using a coded excitation. Owing to its continuous interaction with the medium, CEUI can in theory achieve a frame rate limited only by the sampling frequency. This work presents the first experimental validation of CEUI in a 1D setup using separate transmit and receive transducers for Motion-Mode imaging. Compared to PE performed at different PRFs (up to 10 kHz), CEUI achieved a frame rate of 1 MHz, enabling precise tracking of both slow and fast motions. These results demonstrate the feasibility of CEUI and its potential to surpass PE imaging in high frame rate applications.