ABSTRACT
The study of internal rock structure in the laboratory and using in situ measurements is very important for both practical and theoretical reasons. Information about the spatial distribution of rock properties can be obtained by means of various experimental techniques. In this article the ultrasonic (acoustic) tomography imaging technique is discussed. It comprises both classical velocity tomography and attenuation tomography based on measurements of amplitudes, signal spectra decay, pulse broadening and the frequency shift method. Special attention is given to a new method combining of classical velocity tomography and attenuation tomography resulting in the robust and sensitive enhanced velocity tomography.
