High-Framerate B-Mode Ultrasound Imaging Using Continuous Emission

Despite being the widest used paradigm for echography, pulse-echo remains, even for ultrafast methods, an approach with intrinsic limitations. First, the framerate is constrained depending on the investigated depth. Second, it is blind to phenomena happening in the medium during most of the acquisition time. With the aim of imaging fast and short events, continuous emission ultrasound can be a solution as it overcomes latter issues by allowing to continuously probe the medium. However, the main challenge is then to extract wisely the information needed to estimate an echogenecity map of the medium at a given time. We propose a method to generate a B-Mode image sequence at a very high framerate, up to the sampling frequency of the system. To do so, the problem is reformulated as a sequence of synthetic aperture approaches. The carried out simulation study provides encouraging results with a tremendous temporal resolution enhancement.