Xu Yuan, Xu Minghua, Wang Lihong V
Department of Biomedical Engineering, Texas A&M University, College Station 77843-3120, USA.
IEEE Trans Med Imaging. 2002 Jul;21(7):829-33. doi: 10.1109/TMI.2002.801171.
Microwave-induced thermoacoustic tomography (TAT) in a cylindrical configuration is developed to image biological tissue. Thermoacoustic signals are acquired by scanning a flat ultrasonic transducer. Using a new expansion of a spherical wave in cylindrical coordinates, we apply the Fourier and Hankel transforms to TAT and obtain an exact frequency-domain reconstruction method. The effect of discrete spatial sampling on image quality is analyzed. An aliasing-proof reconstruction method is proposed. Numerical and experimental results are included.
开发了一种圆柱配置的微波诱导热声断层扫描（TAT）技术用于对生物组织成像。通过扫描平面超声换能器获取热声信号。利用圆柱坐标系中球面波的一种新展开式，我们将傅里叶变换和汉克尔变换应用于TAT，并得到了一种精确的频域重建方法。分析了离散空间采样对图像质量的影响。提出了一种抗混叠重建方法。文中包含了数值和实验结果。
