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

Abstract

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

Aqueous synthesis of PEGylated copper sulfide nanoparticles for photoacoustic imaging of tumors

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“…5,6 Meanwhile, PA imaging provides inherently background-free detection attributed to the fact that nonabsorbing tissue components present no background, and it overcomes the speckle artifact of ultrasound imaging. [8][9][10] To further enhance the contrast in PA images, exogenous absorbers in the NIR region known as PA contrast agents are intensely investigated over the past decade. [8][9][10] To further enhance the contrast in PA images, exogenous absorbers in the NIR region known as PA contrast agents are intensely investigated over the past decade.…”

Numerical investigation of the effects of shear waves in transcranial photoacoustic tomography with a planar geometry

“…To attain estimates of AðrÞ from the non-uniformly sampled data, either interpolation of the data to a uniform grid in k z followed by an FFT is required, or both steps can be performed at once using a nonuniform FFT (NUFFT). 30 In either case, the interpolation is performed along vertical lines in the Ewald sphere. One notes that the error maps shown in Figs.…”

Nanomaterial-based activatable imaging probes: from design to biological applications

“…181 Bell observed an audible sound signal from a thin sheet of material when exposed to a sunlight beam. 185 Except for these endogenous optical absorbers, the emergence of exogenous contrast agents accelerated PA imaging applications in signal sensing, functional imaging, biomarker labeling and therapy monitoring greatly. Since 1938, the detection of small carbon dioxide concentration in nitrogen gas utilizing the photoacoustic effect by Mark Leonidovitch Veingerov opened the wider applications of PA spectroscopy and PA imaging, especially in the early 21st century, ascribing to good development of laser technology and biomedical technology.…”