title: Time domain simulation of harmonic ultrasound images and beam patterns in 3D using the k-space pseudospectral method.
abstract: A k-space pseudospectral model is developed for the fast full-wave simulation of nonlinear ultrasound propagation through heterogeneous media. The model uses a novel equation of state to account for nonlinearity in addition to power law absorption. The spectral calculation of the spatial gradients enables a significant reduction in the number of required grid nodes compared to finite difference methods. The model is parallelized using a graphical processing unit (GPU) which allows the simulation of individual ultrasound scan lines using a 256 x 256 x 128 voxel grid in less than five minutes. Several numerical examples are given, including the simulation of harmonic ultrasound images and beam patterns using a linear phased array transducer.
authors: College of Engineering and Computer Science, The Australian National University.
authors: Bradley E
authors: BE
authors: Treeby
authors: Mustafa
authors: M
authors: Tumen
authors: B T
authors: BT
authors: Cox
mesh_terms: D000042:Absorption; D000162:Acoustics; D000465:Algorithms; D003196:Computer Graphics; D003198:Computer Simulation; D019220:High-Energy Shock Waves; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D015233:Models, Statistical; D015203:Reproducibility of Results; D012984:Software; D013997:Time Factors; D014465:Ultrasonics; D014463:Ultrasonography / Q000379:methods*