Mohajerani Pouyan, Kellnberger Stephan, Ntziachristos Vasilis
Opt Lett. 2014 Sep 15;39(18):5455-8. doi: 10.1364/OL.39.005455.
We present a time-efficient backprojection image reconstruction approach applied to frequency-domain (FD) optoacoustic tomography based on tissue illumination at multiple, discrete frequencies. The presented method estimates the Fourier transform of a spatial, circular profile of the underlying image using the amplitude and phase data. These data are collected over multiple frequencies using an acoustic transducer positioned at several locations around the sample. Fourier-transform values for absent frequencies are estimated using interpolation based on low-pass filtering in the image domain. Reconstruction results are presented for synthetic measurements using numerical phantoms, and the results are compared with FD model-based reconstructions.
我们提出了一种时间高效的反投影图像重建方法，该方法应用于基于多个离散频率的组织照明的频域（FD）光声断层扫描。所提出的方法使用幅度和相位数据估计基础图像的空间圆形轮廓的傅里叶变换。这些数据是使用位于样品周围几个位置的声学换能器在多个频率上收集的。基于图像域中的低通滤波，使用插值来估计缺失频率的傅里叶变换值。给出了使用数值模型进行合成测量的重建结果，并将结果与基于FD模型的重建结果进行了比较。
