![wave imaging wave imaging](https://img.yumpu.com/39770133/1/500x640/thz-wave-imaging-for-non-destructive-testing.jpg)
Wave imaging series#
explored the use of a series of plane wave transmissions, each with a different steering angle, to be subsequently beamformed and coherently compounded into one single frame, in order to virtually and dynamically recreate focusing points.
![wave imaging wave imaging](https://songp.ece.illinois.edu/files/2018/08/pictures2-1024x768.png)
Several studies have been carried out to restore the image quality while using this new imaging technique. As a consequence, even though the frame rate largely increases, the image quality worsens. Disadvantage of this technique is the absence of the focus, which allows to concentrate the energy in specific regions to improve the spatial resolution. Plane wave imaging greatly decreases the time requested to perform a scan and allows to increase the frame rate by two orders of magnitude, reaching frequencies of thousands of Hz. Thanks to this new technique, it is possible to insonify the entire image area in a single transmission, rather than using a number of focused lines. In the last decade, the development of parallel computing, especially in terms of GPUs (graphics processing units), paved the way to the definition of a new method for ultrasound imaging, namely the plane wave transmission. Traditionally, echography consists in conveying focused ultrasound waves line by line and in juxtaposing the received backscattered echoes from each line. to detect movements or to reduce motion artefacts. Ultrafast ultrasound is an imaging technique intended to replace conventional ultrasound scanning when very high temporal resolutions are needed, e.g.