Abstract: A computer program product resides on a computer-readable medium and comprises computer-readable, computer-executable instructions for causing a computer to transmit first indicia for an ultrasound propagation arrangement to propagate ultrasound energy toward a focal region containing an object, receive second indicia from a receiver positioned to receive the propagated ultrasound energy after passing at least one of by and through the object and configured to transduce the received ultrasound energy into the second indicia, analyze the second indicia to determine magnitude and phase of the received ultrasound energy, and use the determined magnitude and phase of the received ultrasound energy and knowledge of the ultrasound energy propagated from the propagation arrangement to mathematically propagate indicia of at least one of the received ultrasound energy and the transmitted ultrasound energy to a common location.

Abstract: A method of determining a property of a desired region in an object includes transmitting first and second energy beams from first and second sources into the object such that the beams intersect at the desired region to induce vibration of the desired region, transmitting energy from a third source into the desired region, receiving signals from the desired region due to the energy from the third source, and analyzing at least one of amplitude, phase and frequency of the vibration of the desired region indicated by the received signals to determine the property of the desired region.