Publications [#68137] of Qing H. Liu

Papers Published

1. Kim Hwa Lim and Liu, Q.H., Thermoacoustic tomography modeling with spectral element method, 2006 IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No. 06CH37758C) (2006), pp. 1409 -, Albuquerque, NM, USA
   (last updated on 2007/04/17)

   Abstract:
   Summary form only given. In this work, we propose a spectral element method (SEM) to solve the thermoacoustic tomography (TAT) forward problem. With the use of Gauss-Lobatto-Legendre (GLL) polynomials as basis functions and GLL points as quadrature integration points, the SEM can achieve the same accuracy as the FEM with a much lower sampling density, and therefore the number of unknowns can be greatly reduced. A perfectly matched layer (PML) is used at the boundary of the computational domain to absorb outgoing waves. Numerical results are shown to validate the SEM, and to demonstrate the significant advantages of the SEM over the FEM for large-scale realistic TAT problems

   Keywords:
   acoustic tomography;biomedical ultrasonics;finite element analysis;image reconstruction;medical image processing;polynomials;thermoacoustics;ultrasonic imaging;