Bahr Ludwig, Lerch Reinhard
Department of Sensor Technology, Friedrich-Alexander-University, Erlandgen-Nuremberg, Germany.
IEEE Trans Ultrason Ferroelectr Freq Control. 2008 Feb;55(2):405-14. doi: 10.1109/TUFFC.2008.658.
A method for reconstructing the sound pressure profile from interferometer measurements using computed tomography is presented. In accordance with the term light diffraction tomography, in short we want to call the method light refractive tomography, because it is based on the sound pressure-induced refractive index change along the laser beam. We compare three tomographic reconstruction methods applicable to axisymmetric beam profiles, namely, the filtered back-projection, the Hankel Fourier method, and the onion peeling method, the latter based on Nestor and Olsens algorithm. Results are compared to hydrophone measurements. The performance of the tomographic algorithms are reflected by general considerations on the reconstruction of noise signals.
提出了一种利用计算机断层扫描从干涉仪测量中重建声压分布的方法。根据光衍射断层扫描这一术语，简而言之，我们想将该方法称为光折射断层扫描，因为它基于沿激光束的声压引起的折射率变化。我们比较了三种适用于轴对称光束分布的断层重建方法，即滤波反投影法、汉克尔傅里叶法和基于内斯特和奥尔森算法的剥洋葱法。将结果与水听器测量结果进行比较。断层算法的性能通过对噪声信号重建的一般考虑来反映。
