Title :
Computer model for harmonic ultrasound imaging
Author :
Li, Yadong ; Zagzebski, James A.
Author_Institution :
Dept. of Med. Phys., Wisconsin Univ., Madison, WI, USA
Abstract :
Harmonic ultrasound imaging has received great attention from ultrasound scanner manufacturers and researchers. In this paper, we present a computer model that can generate realistic harmonic images. In this model, the incident ultrasound is modeled after the "KZK" equation, and the echo signal is modeled using linear propagation theory because the echo signal is much weaker than the incident pulse. Both time domain and frequency domain numerical solutions to the "KZK" equation were studied. Realistic harmonic images of spherical lesion phantoms were generated for scans by a circular transducer. This model can be a very useful tool for studying the harmonic buildup and dissipation processes in a nonlinear medium, and it can be used to investigate a wide variety of topics related to B-mode harmonic imaging.
Keywords :
biomedical ultrasonics; ultrasonic imaging; B-mode imaging; KZK equation; circular transducer; computer model; echo signal; harmonic ultrasound imaging; linear propagation; nonlinear medium; spherical lesion phantom; ultrasound scanner; Acoustic imaging; Acoustic noise; Acoustic propagation; Acoustic pulses; Biomedical imaging; Diffraction; Frequency domain analysis; Nonlinear equations; Ultrasonic imaging; Ultrasonic transducers;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
