Figure 2.

Comparison between different methods for rendering the speed-of-sound (SoS) images with transmission ultrasound computed tomography. (a) Straight ray approximation. (b) Bézier curve reconstruction. (c) Full-wave inversion (FWI). Reconstructions from different cross sections acquired from the same mouse with 1 mm steps are shown – see Figure 1b. The SoS values were calculated over the tumor (green curve) and urinary bladder (cyan curve) areas manually segmented in the FWI images. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)