Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison of travel time (top row) and waveform (bottom row) reconstruction methods using newer ultrasound tomography unit. Gray scale values in the sound speed images correspond to a range of 1400–1575 m/s. Brighter areas correspond to higher sound speed. (a) Very fine parenchyma patterns. (b) 1 cm tumor (10 o’clock). (c) 4 cm tumor (3 o’clock).
