Evaluation of different approaches for transmission tomography in Ultrasound Computer Tomography

Abstract

An evaluation of standard methods for reconstruction of sound velocity maps for Ultrasound Computer Tomography (USCT) is presented. Different approaches for detection of transmission signals and sound velocity reconstruction are compared using a simulated and a measured data set. The sound velocity map of the measured object could be reconstructed with 3.6 m/s difference between the reconstructed and the real sound velocities, which is feasible for improvement of USCT reflection and scattering images. But the images of the reconstructed velocity maps are blurry and full of artifacts, so that they are at this state of the work only of limited use for diagnostic purposes.