2021/09/21 by Ashkan Javaherian, Ben Cox · 3 citations
Engineering · Medicine · #Photoacoustic and Ultrasonic Imaging #Ultrasonics and Acoustic Wave Propagation #Ultrasound Imaging and Elastography
paper · doi:10.1088/1361-6420/ac28ed
openalex publication_date 2021/09/21 · openalex created_date 2021/09/27 · openalex updated_date 2026/07/30
An efficient and accurate image reconstruction algorithm for ultrasound tomography in soft tissue is described and demonstrated, which can recover accurate sound speed distribution from acoustic time series measurements. The approach is based on a second-order iterative minimisation of the difference between the measurements and a model based on a ray-approximation to the heterogeneous Green's function. It overcomes the computational burden of full-wave solvers while avoiding the drawbacks of time-of-flight methods. Through the use of a second-order iterative minimisation scheme, applied stepwise from low to high frequencies, the effects of scattering are incorporated into the inversion.