Xu Yuan, Feng Dazi, Wang Lihong V
Department of Biomedical Engineering, Texas A&M University, College Station 77843-3120, USA.
IEEE Trans Med Imaging. 2002 Jul;21(7):823-8. doi: 10.1109/tmi.2002.801172.
We report an exact and fast Fourier-domain reconstruction algorithm for thermoacoustic tomography in a planar configuration assuming thermal confinement and constant acoustic speed. The effects of the finite size of the detector and the finite length of the excitation pulse are explicitly included in the reconstruction algorithm. The algorithm is numerically and experimentally verified. We also demonstrate that the blurring caused by the finite size of the detector surface is the primary limiting factor on the resolution and that it can be compensated for by deconvolution.
我们报告了一种精确且快速的傅里叶域重建算法，用于平面配置下的热声层析成像，该算法假设热限制和声速恒定。重建算法中明确考虑了探测器有限尺寸和激发脉冲有限长度的影响。该算法经过了数值和实验验证。我们还证明，探测器表面有限尺寸引起的模糊是分辨率的主要限制因素，并且可以通过反卷积进行补偿。
