On the use of frequency-domain reconstruction algorithms for photoacoustic imaging

摘要

We investigate the use of a frequency-domain reconstruction algorithm based on the nonuniform fastnFourier transform (NUFFT) for photoacoustic imaging (PAI). Standard algorithms based on the fast Fourier transformn(FFT) are computationally efficient, but compromise the image quality by artifacts. In our previous work we havendeveloped an algorithm for PAI based on the NUFFT which is computationally efficient and can reconstruct imagesnwith the quality known from temporal backprojection algorithms. In this paper we review imaging qualities, suchnas resolution, signal-to-noise ratio, and the effects of artifacts in real-world situations. Reconstruction examplesnshow that artifacts are reduced significantly. In particular, image details with a larger distance from the detectorsncan be resolved more accurately than with standard FFT algorithms.