title: Adaptive reverberation noise delay estimation for reverberation suppression in dual band ultrasound imaging.
abstract: The behavior of the propagation delays introduced in dual frequency band ultrasound imaging is discussed. In particular, the delay of reverberation noise components is examined. Using a delay corrected subtraction (DCS) method, it is possible to suppress the reverberation noise if the behavior of the propagation delays is known. Here, a signal adaptive estimation for the reverberation delay is introduced and applied through DCS to suppress reverberation noise in a numerically simulated signal. The reverberation reduction is compared to DCS suppression using a simpler delay estimation and shows that a signal based adaptive estimation yields a improved suppression of reverberation noise. The study indicates that the advantage of the adaptive estimation is highest when the medium has changing nonlinearity with depth.
authors.affiliation: Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, N-7489 Trondheim, Norway.
authors.forename: Ole Martin
authors.initials: OM
authors.lastname: Brende
authors.affiliation: Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, N-7489 Trondheim, Norway.
authors.forename: Bjørn
authors.initials: B
authors.lastname: Angelsen